List of countries by IPv4 address allocation

Last updated

This is a list of countries by IPv4 address allocation.

Contents

The Internet Assigned Numbers Authority (IANA) distributes large blocks of addresses to regional Internet registries (RIRs), which then assign them to national Internet registries and local Internet registries within their respective service regions. [1] While IPv4 allows for a theoretical maximum of 232 addresses (approximately 4.3 billion), the number available for public use is smaller due to reserved blocks for private and special purposes. [2]

Table

#LocationIP addresses [3]  %Population [4] IP addresses per 1000
 (total world allocation)3,686,428,8041008,091,734,930456
1Flag of the United States (23px).png  United States 1,611,092,31643.70343,477,3354,691
2Flag of the People's Republic of China.svg  China 343,122,7889.311,422,584,933241
3Flag of Japan.svg  Japan 189,146,2805.13124,370,9471,521
4Flag of the United Kingdom.svg  United Kingdom 134,326,9923.6468,682,9621,956
5Flag of Germany.svg  Germany 124,181,0243.3784,548,2311,469
6Flag of South Korea.svg  South Korea 112,495,2963.0551,748,7392,174
7Flag of Brazil.svg  Brazil 87,095,9682.36211,140,729413
8Flag of France.svg  France 82,056,6682.2366,438,8221,235
9Flag of Canada (Pantone).svg  Canada 67,971,0361.8439,299,1051,730
10Flag of Italy.svg  Italy 54,019,1081.4759,499,453908
11Flag of the Netherlands.svg  Netherlands 48,103,7921.3018,092,5242,659
12Flag of Australia (converted).svg  Australia 46,443,9601.2626,451,1241,756
13Flag of Russia.svg  Russia 44,862,4561.22145,440,500308
14Flag of India.svg  India 41,620,6081.131,438,069,59629
15Flag of the Republic of China.svg  Taiwan 35,714,9760.9723,317,1451,532
16Flag of Spain.svg  Spain 32,384,7400.8847,911,579676
17Flag of Sweden.svg  Sweden 31,069,6120.8410,551,4942,945
18Flag of Mexico.svg  Mexico 28,990,4360.79129,739,759223
19Flag of South Africa.svg  South Africa 27,076,2040.7363,212,384428
20Flag of Singapore.svg  Singapore 26,575,7760.725,789,0904,591
21Flag of Switzerland (Pantone).svg  Switzerland 25,298,2160.698,870,5612,852
22Flag of Egypt.svg  Egypt 24,147,2520.66114,535,772211
23Flag of Poland.svg  Poland 19,971,2120.5438,762,844515
24Flag of Argentina.svg  Argentina 19,446,3680.5345,538,401427
25Flag of Indonesia.svg  Indonesia 18,982,8560.51281,190,06768
26Flag of Colombia.svg  Colombia 17,372,7240.4752,321,152332
27Flag of Turkey.svg  Turkey 16,702,2400.4587,270,501191
28Flag of Vietnam.svg  Vietnam 16,407,6480.45100,352,192164
29Flag of Norway.svg  Norway 15,553,6160.425,519,1672,818
30Flag of Finland.svg  Finland 13,708,4000.375,601,1852,447
Flag of Hong Kong.svg  Hong Kong 13,154,5840.367,442,7341,767
31Flag of Belgium (civil).svg  Belgium 12,354,3160.3411,712,8931,055
32Flag of Morocco.svg  Morocco 12,271,5800.3337,712,505325
33Flag of Denmark.svg  Denmark 11,968,4440.325,948,1362,012
34Flag of Iran.svg  Iran 11,476,9840.3190,608,707127
35Flag of Austria.svg  Austria 11,233,3840.309,130,4291,230
36Flag of Ireland.svg  Ireland 11,041,6360.305,196,6302,125
37Flag of Saudi Arabia.svg  Saudi Arabia 10,720,2640.2933,264,292322
38Flag of Chile.svg  Chile 10,038,8800.2719,658,835511
39Flag of the Czech Republic.svg  Czech Republic 9,530,2080.2610,809,716882
40Flag of Ukraine.svg  Ukraine 9,269,3840.2537,732,836246
41Flag of Thailand.svg  Thailand 9,189,4440.2571,702,435128
42Flag of Israel.svg  Israel 7,988,8800.229,256,314863
43Flag of Tunisia.svg  Tunisia 7,876,4200.2112,200,431646
44Flag of Romania.svg  Romania 7,755,0720.2119,118,479406
45Flag of Seychelles.svg  Seychelles 7,473,3640.20127,95158,408
46Flag of Venezuela.svg  Venezuela 6,706,4280.1828,300,854237
47Flag of Malaysia 23px.svg  Malaysia 6,699,5400.1835,126,298191
48Flag of Portugal.svg  Portugal 6,692,6840.1810,430,738642
49Flag of New Zealand.svg  New Zealand 6,575,8160.185,172,8361,271
50Flag of Kenya.svg  Kenya 6,182,4640.1755,339,003112
51Flag of the Philippines.svg  Philippines 6,136,6640.17114,891,19953
52Flag of Hungary.svg  Hungary 5,914,4080.169,686,463611
53Flag of Greece.svg  Greece 5,719,4760.1610,242,908558
54Flag of Pakistan.svg  Pakistan 5,459,3080.15247,504,49522
55Flag of the United Arab Emirates.svg  United Arab Emirates 5,393,7320.1510,642,081507
56Flag of Mauritius.svg  Mauritius 4,779,6120.131,273,5883,753
57Flag of Algeria.svg  Algeria 4,763,0080.1346,164,219103
58Flag of Bulgaria.svg  Bulgaria 4,289,9960.126,795,803631
59Flag of Kazakhstan.svg  Kazakhstan 3,273,7240.0920,330,104161
60Flag of Peru.svg  Peru 3,242,7520.0933,845,61796
61Flag of Nigeria.svg  Nigeria 3,173,1760.09227,882,94514
62Flag of Slovakia.svg  Slovakia 2,739,7280.075,518,055497
63Flag of Ecuador.svg  Ecuador 2,715,5240.0717,980,083151
64Flag of Slovenia.svg  Slovenia 2,673,0760.072,118,3961,262
65Flag of Lithuania.svg  Lithuania 2,637,8600.072,854,099924
66Flag of Uruguay.svg  Uruguay 2,445,7360.073,388,081722
67Flag of Croatia.svg  Croatia 2,344,1480.063,896,023602
68Flag of Costa Rica.svg  Costa Rica 2,331,9400.065,105,525457
69Flag of Serbia.svg  Serbia 2,293,0960.066,773,201339
70Flag of Ghana.svg  Ghana 2,191,8280.0633,787,91465
71Flag of Bangladesh.svg  Bangladesh 2,003,1000.05171,466,99012
72Flag of Kuwait.svg  Kuwait 1,906,6640.054,838,782394
73Flag of Sudan.svg  Sudan 1,890,9320.0550,042,79138
74Flag of Latvia.svg  Latvia 1,842,7360.051,882,396979
75Flag of Luxembourg.svg  Luxembourg 1,833,8680.05665,0982,757
76Flag of Belarus.svg  Belarus 1,789,8200.059,115,680196
77Flag of Panama.svg  Panama 1,734,7920.054,458,759389
78Flag of Cote d'Ivoire.svg  Ivory Coast 1,712,1960.0531,165,65455
79Flag of Zambia.svg  Zambia 1,647,2040.0420,723,96579
80Flag of the Dominican Republic.svg  Dominican Republic 1,614,2320.0411,331,265142
81Flag of Uganda.svg  Uganda 1,433,7400.0448,656,60129
82Flag of Estonia.svg  Estonia 1,308,0720.041,367,196957
83Flag of Georgia.svg  Georgia 1,285,1840.033,807,492338
84Flag of Syria.svg  Syria 1,276,8560.0323,594,62354
85Flag of Angola.svg  Angola 1,270,2560.0336,749,90635
86Flag of Cyprus.svg  Cyprus 1,267,8320.031,344,976943
87Flag of Moldova.svg  Moldova 1,246,2080.033,067,070406
88Flag of Bolivia.svg  Bolivia 1,169,4520.0312,244,15996
89Flag of Paraguay.svg  Paraguay 1,152,4320.036,844,146168
90Flag of Tanzania.svg  Tanzania 1,076,8120.0366,617,60616
91Flag of Oman.svg  Oman 950,9960.035,049,269188
92Flag of Iceland.svg  Iceland 892,3200.02387,5582,302
93Flag of Palestine.svg  Palestine 874,2720.025,409,202162
94Flag of Qatar.svg  Qatar 843,6040.022,979,082283
95Flag of Bosnia and Herzegovina.svg  Bosnia and Herzegovina 788,3360.023,185,073248
96Flag of Azerbaijan.svg  Azerbaijan 767,2280.0210,318,20774
Flag of Puerto Rico.svg  Puerto Rico 761,7640.023,242,023235
97Flag of Malta.svg  Malta 690,8000.02532,9561,296
98Flag of North Macedonia.svg  North Macedonia 685,5080.021,831,802374
99Flag of Armenia.svg  Armenia 668,4560.022,943,393227
100Flag of El Salvador.svg  El Salvador 663,7280.026,309,624105
101Flag of Jordan.svg  Jordan 645,6560.0211,439,21356
102Flag of Guatemala.svg  Guatemala 642,7480.0218,124,83835
103Flag of Cameroon.svg  Cameroon 599,5720.0228,372,68721
104Flag of Madagascar.svg  Madagascar 578,4600.0231,195,93219
105Flag of Nepal.svg  Nepal 574,2280.0229,694,61419
106Flag of Lebanon.svg  Lebanon 567,0960.025,773,49398
107Flag of Sri Lanka.svg  Sri Lanka 564,1400.0222,971,61725
108Flag of Malawi.svg  Malawi 554,8160.0221,104,48226
109Flag of Trinidad and Tobago.svg  Trinidad and Tobago 544,5320.011,502,932362
110Flag of Honduras.svg  Honduras 534,5280.0110,644,85150
111Flag of Albania.svg  Albania 484,7560.012,811,655172
112Flag of Namibia.svg  Namibia 465,0080.012,963,095157
113Flag of Libya.svg  Libya 448,5280.017,305,65961
114Flag of Bahrain.svg  Bahrain 445,4760.011,569,666284
115Flag of Iraq.svg  Iraq 445,4440.0145,074,04910
116Flag of Mozambique.svg  Mozambique 444,4640.0133,635,16013
Flag of France.svg  Réunion 424,6040.01874,883485
117Flag of Nicaragua.svg  Nicaragua 411,9440.016,823,61360
118Flag of Cambodia.svg  Cambodia 406,7640.0117,423,88023
119Flag of Senegal.svg  Senegal 404,0800.0118,077,57322
120Flag of Gabon.svg  Gabon 393,6320.012,484,789158
121Flag of Ethiopia.svg  Ethiopia 368,5800.01128,691,6923
122Flag of Togo (3-2).svg  Togo 353,7280.019,304,33738
Flag of Macau.svg  Macau 337,5120.01713,912473
123Flag of Burkina Faso.svg  Burkina Faso 336,6960.0123,025,77615
124Flag of Uzbekistan.svg  Uzbekistan 286,3000.0135,652,3078
125Flag of Rwanda.svg  Rwanda 280,7160.0113,954,47120
126Flag of The Gambia.svg  Gambia 272,8080.012,697,845101
127Flag of Kyrgyzstan.svg  Kyrgyzstan 269,9560.017,073,51638
128Flag of Cuba.svg  Cuba 256,9400.0111,019,93123
129Flag of Myanmar.svg  Myanmar 238,9760.0154,133,7984
Flag of Gibraltar.svg  Gibraltar 238,0440.0138,4716,188
130Flag of Yemen.svg  Yemen 233,3520.0139,390,7996
131Flag of Jamaica.svg  Jamaica 223,0320.012,839,78679
Flag of Guam.svg  Guam 219,2760.01166,5061,317
132Flag of Brunei.svg  Brunei 216,1680.01458,949471
133Flag of Montenegro.svg  Montenegro 209,2000.01633,552330
Flag of Curacao.svg  Curaçao 200,0040.01185,4271,079
134Flag of Antigua and Barbuda.svg  Antigua and Barbuda 180,3120.0093,3161,932
135Flag of Mongolia.svg  Mongolia 180,2400.003,431,93253
136Flag of the Taliban.svg  Afghanistan 176,8920.0041,454,7614
137Flag of the Democratic Republic of the Congo.svg  Democratic Republic of the Congo 175,5680.00105,789,7312
138Flag of Barbados.svg  Barbados 168,5840.00282,336597
Flag of the British Virgin Islands.svg  British Virgin Islands 165,6880.0038,9854,250
139Flag of Belize.svg  Belize 165,5520.00411,106403
140Flag of Botswana.svg  Botswana 161,8520.002,480,24465
Flags of New Caledonia.svg  New Caledonia 161,3520.00289,870557
141Flag of Haiti.svg  Haiti 154,7800.0011,637,39813
142Flag of Benin.svg  Benin 147,5760.0014,111,03410
Flag of Jersey.svg  Jersey 144,2160.00103,6741,391
143Flag of Fiji.svg  Fiji 142,7000.00924,145154
144Flag of the Republic of the Congo.svg  Republic of the Congo 141,4880.006,182,88523
145Flag of the Bahamas.svg  Bahamas 138,6480.00399,440347
Flag-of-Martinique.svg  Martinique 134,5680.00346,002389
Flag of Europe.svg  Europe 131,0640.00 [a]
Flag of the Isle of Man.svg  Isle of Man 129,0480.0084,1651,533
Flag of France.svg  Guadeloupe 124,6120.00376,517331
146Flag of Lesotho.svg  Lesotho 120,7560.002,311,47252
Flag of the United States Virgin Islands.svg  United States Virgin Islands 118,4600.0085,7011,382
Flag of Aruba.svg  Aruba 111,8200.00107,9391,036
Flag of Bermuda.svg  Bermuda 111,6840.0064,6981,726
147Flag of Liechtenstein.svg  Liechtenstein 105,9960.0039,5982,677
148Flag of Zimbabwe.svg  Zimbabwe 101,9880.0016,340,8226
149Flag of Maldives.svg  Maldives 93,7640.00525,994178
150Flag of Mali.svg  Mali 92,5640.0023,769,1274
151Flag of Laos.svg  Laos 87,0720.007,664,99311
152Flag of Sierra Leone.svg  Sierra Leone 82,8440.008,460,51210
153Flag of Tajikistan.svg  Tajikistan 82,7120.0010,389,7998
154Flag of Suriname.svg  Suriname 81,6080.00628,886130
Flag of French Polynesia.svg  French Polynesia 75,4440.00281,118268
155Flag of Papua New Guinea.svg  Papua New Guinea 72,4360.0010,389,6357
156Flag of Guyana.svg  Guyana 68,8080.00826,35383
157Flag of Monaco.svg  Monaco 63,6600.0038,9561,634
158Flag of Andorra.svg  Andorra 57,2560.0080,856708
159Flag of Eswatini.svg  Eswatini 54,1760.001,230,50644
160Flag of Somalia.svg  Somalia 50,8280.0018,358,6153
161Flag of Mauritania.svg  Mauritania 46,2840.005,022,4419
162Flag of Djibouti.svg  Djibouti 46,0520.001,152,94440
163Flag of Niger.svg  Niger 45,0080.0026,159,8672
Flag of the Faroe Islands.svg  Faroe Islands 45,0000.0054,714822
Flag of the Cayman Islands.svg  Cayman Islands 44,1960.0073,038605
164Flag of Bhutan.svg  Bhutan 43,6040.00786,38555
Flag of Guernsey.svg  Guernsey 40,6080.0064,017634
165Flag of Liberia 23px.svg  Liberia 39,0920.005,493,0317
166Flag of San Marino.svg  San Marino 38,8320.0033,7331,151
167Flag of Cape Verde.svg  Cape Verde 38,0520.00522,33173
168Flag of Guinea.svg  Guinea 38,0480.0014,405,4683
169Flag of Burundi.svg  Burundi 36,8120.0013,689,4503
Flag of Sint Maarten.svg  Sint Maarten 34,2520.0042,749801
Flag of Greenland.svg  Greenland 34,2040.0055,922612
170Flag of South Sudan.svg  South Sudan 26,2520.0011,483,3742
171Flag of Chad.svg  Chad 25,7760.0019,319,0641
Flag of the Netherlands.svg  Caribbean Netherlands 24,7840.0029,898829
172Flag of East Timor.svg  Timor-Leste 23,4360.001,384,28617
Flag of France.svg  French Guiana 22,5040.00303,40274
173Flag of Turkmenistan.svg  Turkmenistan 21,9800.007,364,4383
174Flag of Saint Lucia.svg  Saint Lucia 20,6560.00179,285115
175Flag of Samoa.svg  Samoa 19,9040.00216,66392
176Flag of Saint Kitts and Nevis.svg  Saint Kitts and Nevis 19,6480.0046,758420
177Flag of Equatorial Guinea.svg  Equatorial Guinea 17,8800.001,847,54910
178Flag of Vanuatu.svg  Vanuatu 16,3040.00320,40951
Flag of the Northern Mariana Islands.svg  Northern Mariana Islands 15,3360.0045,143340
179Flag of Dominica.svg  Dominica 14,5360.0066,510219
180Flag of the Solomon Islands.svg  Solomon Islands 14,2880.00800,00518
181Flag of Tonga.svg  Tonga 11,4760.00104,597110
182Flag of Grenada.svg  Grenada 10,9520.00117,08194
183Flag of Vatican City (2023-present).svg  Vatican City 10,7360.0049621,645
Flag of the Turks and Caicos Islands.svg  Turks and Caicos Islands 10,4680.0046,198227
184Flag of Nauru.svg  Nauru 10,2120.0011,875860
185Flag of Saint Vincent and the Grenadines.svg  Saint Vincent and the Grenadines 10,1960.00101,323101
Flag of Anguilla.svg  Anguilla 9,6920.0014,410673
186Flag of Sao Tome and Principe.svg  São Tomé and Príncipe 9,2080.00230,87140
187Flag of the Cook Islands.svg  Cook Islands 8,6960.0014,222611
188Flag of the Federated States of Micronesia.svg  Federated States of Micronesia 8,6840.00112,63077
189Flag of Tuvalu.svg  Tuvalu 8,1880.009,816834
190Flag of the Comoros.svg  Comoros 7,1520.00850,3878
Flag of the Falkland Islands.svg  Falkland Islands 7,1240.003,4772,049
191Flag of Palau.svg  Palau 6,1280.0017,727346
192Flag of Guinea-Bissau.svg  Guinea-Bissau 5,6200.002,153,3393
193Flag of the Central African Republic.svg  Central African Republic 5,3560.005,152,4211
Flag of American Samoa.svg  American Samoa 5,1120.0047,521108
Flag of France.svg  Saint Pierre and Miquelon 4,6000.005,681810
194Flag of the Marshall Islands.svg  Marshall Islands 4,5880.0038,827118
195Flag of Eritrea.svg  Eritrea 4,0920.003,470,3901
Flag of Aland.svg  Åland Islands 4,0920.0026,711153
196Flag of Kiribati.svg  Kiribati 4,0760.00132,53031
Flag of France.svg  Wallis and Futuna 3,5720.0011,370314
Flag of France.svg  Saint Martin 3,5560.0027,515129
Flag of the Commissioner of the British Indian Ocean Territory.svg  British Indian Ocean Territory 3,0640.004,000766
Flag of Tokelau.svg  Tokelau 3,0520.002,3971,273
197Flag of Niue.svg  Niue 2,0400.001,8171,123
Flag of Montserrat.svg  Montserrat 1,2720.004,420288
198Flag of North Korea.svg  North Korea 1,0200.0026,418,2040
Flag of France.svg  Mayotte 1,0200.00316,0153
Flag of Norfolk Island.svg  Norfolk Island 7600.001,828416
Flag of France.svg  Saint Barthélemy 7560.0011,08568
199Flag of Kosovo.svg  Kosovo 01,700,031
199Flag of the Sahrawi Arab Democratic Republic.svg  Western Sahara 0579,729
Flag of the United Kingdom.svg  Saint Helena, Ascension and Tristan da Cunha 05,289
Flag of Norway.svg  Svalbard and Jan Mayen 02,550
Flag of Christmas Island.svg  Christmas Island 01,500
Flag of the Cocos (Keeling) Islands.svg  Cocos (Keeling) Islands 0628
Flag of the French Southern and Antarctic Lands.svg  French Southern and Antarctic Lands 0140
Flag of the Pitcairn Islands.svg  Pitcairn Islands 046
Flag of South Georgia and the South Sandwich Islands.svg  South Georgia and the South Sandwich Islands 030
Flag of Norway.svg  Bouvet Island 00
Flag of Australia (converted).svg  Heard Island and McDonald Islands 00
Flag of the United States (DoS ECA Color Standard).svg  United States Minor Outlying Islands 00
  1. Some RIPE NCC IP assignments list "EU" as the country; WHOIS queries are used to assign specific countries where possible, but unresolved cases remain as "European."

See also

Related Research Articles

An Internet Protocol address is a numerical label such as 192.0.2.1 that is assigned to a device connected to a computer network that uses the Internet Protocol for communication. IP addresses serve two main functions: network interface identification, and location addressing.

<span class="mw-page-title-main">IPv4</span> Fourth version of the Internet Protocol

Internet Protocol version 4 (IPv4) is the first version of the Internet Protocol (IP) as a standalone specification. It is one of the core protocols of standards-based internetworking methods in the Internet and other packet-switched networks. IPv4 was the first version deployed for production on SATNET in 1982 and on the ARPANET in January 1983. It is still used to route most Internet traffic today, even with the ongoing deployment of Internet Protocol version 6 (IPv6), its successor.

Classless Inter-Domain Routing is a method for allocating IP addresses for IP routing. The Internet Engineering Task Force introduced CIDR in 1993 to replace the previous classful network addressing architecture on the Internet. Its goal was to slow the growth of routing tables on routers across the Internet, and to help slow the rapid exhaustion of IPv4 addresses.

A multicast address is a logical identifier for a group of hosts in a computer network that are available to process datagrams or frames intended to be multicast for a designated network service. Multicast addressing can be used in the link layer, such as Ethernet multicast, and at the internet layer for Internet Protocol Version 4 (IPv4) or Version 6 (IPv6) multicast.

<span class="mw-page-title-main">APNIC</span> Regional Internet registry for the Asia Pacific region

APNIC is the regional Internet address registry (RIR) for the Asia–Pacific region. It is one of the world's five RIRs and is part of the Number Resource Organization (NRO).

<span class="mw-page-title-main">Internet Assigned Numbers Authority</span> Standards organization overseeing IP addresses

The Internet Assigned Numbers Authority (IANA) is a standards organization that oversees global IP address allocation, autonomous system number allocation, root zone management in the Domain Name System (DNS), media types, and other Internet Protocol–related symbols and Internet numbers.

Bogon filtering is the practice of blocking packets known as bogons, which are ones sent to a computer network claiming to originate from invalid or bogus IP addresses, known as bogon addresses.

A Martian packet is an IP packet seen on the public Internet that contains a source or destination address that is reserved for special use by the Internet Assigned Numbers Authority (IANA) as defined in RFC 1812, Appendix B Glossary. On the public Internet, such a packet either has a spoofed source address, and it cannot actually originate as claimed, or the packet cannot be delivered. The requirement to filter these packets is found in RFC 1812, Section 5.3.7.

In the context of the Internet addressing structure, an address pool is a set of Internet Protocol addresses available at any level in the IP address allocation hierarchy. At the top level, the IP address pool is managed by the Internet Assigned Numbers Authority (IANA). The total IPv4 address pool contains 4294967296 (232) addresses, while the size of the IPv6 address pool is 2128 (340282366920938463463374607431768211456) addresses.

In Internet networking, a private network is a computer network that restricts access to it. Only devices, systems, and users with appropriate authorization and authentication can connect to a private network.

anoNet is a decentralized friend-to-friend network built using VPNs and software BGP routers. anoNet works by making it difficult to learn the identities of others on the network allowing them to anonymously host IPv4 and IPv6 services. One of the primary goals of anoNet is to protect its participants' rights of speech and expression.

<span class="mw-page-title-main">RIPE NCC</span> Regional Internet Registry representing Europe, the former USSR and West Asia

RIPE NCC is the regional Internet registry (RIR) for Europe, the Middle East, and parts of Central Asia. Its headquarters are in Amsterdam, Netherlands, with a branch office in Dubai, UAE.

In the Internet addressing architecture, the Internet Engineering Task Force (IETF) and the Internet Assigned Numbers Authority (IANA) have reserved various Internet Protocol (IP) addresses for special purposes.

<span class="mw-page-title-main">IPv4 address exhaustion</span> Depletion of unallocated IPv4 addresses

IPv4 address exhaustion is the depletion of the pool of unallocated IPv4 addresses. Because the original Internet architecture had fewer than 4.3 billion addresses available, depletion has been anticipated since the late 1980s when the Internet started experiencing dramatic growth. This depletion is one of the reasons for the development and deployment of its successor protocol, IPv6. IPv4 and IPv6 coexist on the Internet.

A unique local address (ULA) is an Internet Protocol version 6 (IPv6) address in the address range fc00::/7. These addresses are non-globally reachable. For this reason, ULAs are somewhat analogous to IPv4 private network addressing, but with significant differences. Unique local addresses may be used freely, without centralized registration, inside a single site or organization or spanning a limited number of sites or organizations.

The Internet Protocol Version 4 address 0.0.0.0 can have multiple uses.

<span class="mw-page-title-main">IPv6 address</span> Label to identify a network interface of a computer or other network node

An Internet Protocol version 6 address is a numeric label that is used to identify and locate a network interface of a computer or a network node participating in a computer network using IPv6. IP addresses are included in the packet header to indicate the source and the destination of each packet. The IP address of the destination is used to make decisions about routing IP packets to other networks.

<span class="mw-page-title-main">Carrier-grade NAT</span> Type of network address translation

Carrier-grade NAT, also known as large-scale NAT (LSN), is a type of network address translation (NAT) used by ISPs in IPv4 network design. With CGNAT, end sites, in particular residential networks, are configured with private network addresses that are translated to public IPv4 addresses by middlebox network address translator devices embedded in the network operator's network, permitting the sharing of small pools of public addresses among many end users. This essentially repeats the traditional customer-premise NAT function at the ISP level.

In order to ensure proper working of carrier-grade NAT (CGN), and, by doing so, alleviating the demand for the last remaining IPv4 addresses, a /10 size IPv4 address block was assigned by Internet Assigned Numbers Authority (IANA) to be used as shared address space. This block of addresses is specifically meant to be used by Internet service providers that implement carrier-grade NAT, to connect their customer-premises equipment (CPE) to their core routers.

References

  1. "Number Resources". www.iana.org.
  2. "IANA IPv4 Address Space Registry". www.iana.org.
  3. Maez, Dave (11 December 2024). "IP Address Allocation by Country". impliedchaos.github.io. Retrieved 12 December 2024.
  4. "World Population Prospects - Population Division - United Nations". population.un.org. 1 July 2023. Retrieved 12 December 2024.