Autonomous System (AS) Numbers
- Last Updated
- 2024-04-10
- Note
-
Autonomous System (AS) Numbers are used by various routing protocols. IANA allocates AS Numbers to Regional Internet Registries (RIRs). The RIRs further allocate or assign AS Numbers to network operators in line with RIR policies. The [five RIRs] are: - [AFRINIC] - [APNIC] - [ARIN] - [LACNIC] - [RIPE_NCC] AS Numbers can be obtained from the registry in your region.
- Available Formats
-
XML
HTML
Plain text
Registries included below
16-bit Autonomous System Numbers
- Registration Procedure(s)
-
RIR request to the IANA or IETF Review. Allocated following the Global Policy published at [http://www.icann.org/en/resources/policy/global-addressing].
- Reference
- [RFC1930][RFC5398][RFC6996][RFC7249]
- Available Formats
-
CSV
| Number | Description | WHOIS | RDAP | Reference | Registration Date |
|---|---|---|---|---|---|
| 0 | Reserved | [RFC7607] | |||
| 1-1876 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 1877-1901 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 1902-2042 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 2043 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 2044-2046 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 2047 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 2048-2106 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 2107-2136 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 2137-2584 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 2585-2614 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 2615-2772 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 2773-2822 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 2823-2829 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 2830-2879 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 2880-3153 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 3154-3353 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 3354-4607 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 4608-4865 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | ||
| 4866-5376 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 5377-5631 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 5632-6655 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 6656-6911 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 6912-7466 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 7467-7722 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | ||
| 7723-8191 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 8192-9215 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 9216-10239 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | ||
| 10240-12287 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 12288-13311 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 13312-15359 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 15360-16383 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 16384-17407 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 17408-18431 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | ||
| 18432-20479 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 20480-21503 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 21504-23455 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 23456 | AS_TRANS | [RFC6793] | |||
| 23457-23551 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
||
| 23552-24575 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | ||
| 24576-25599 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | ||
| 25600-26623 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2002-03 | |
| 26624-27647 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2002-09 | |
| 27648-28671 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2002-11 | |
| 28672-29695 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2002-12 | |
| 29696-30719 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2003-03 | |
| 30720-31743 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2003-09 | |
| 31744-32767 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2003-11 | |
| 32768-33791 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2004-05 | |
| 33792-34815 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2004-06 | |
| 34816-35839 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2005-02 | |
| 35840-36863 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2005-02 | |
| 36864-37887 | Assigned by AFRINIC | whois.afrinic.net | https://rdap.afrinic.net/rdap/ http://rdap.afrinic.net/rdap/ |
2005-04 | |
| 37888-38911 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2005-06 | |
| 38912-39935 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2005-09 | |
| 39936-40959 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2006-03-29 | |
| 40960-41983 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2006-04-13 | |
| 41984-43007 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2006-11-17 | |
| 43008-44031 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2007-04-23 | |
| 44032-45055 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2007-09-14 | |
| 45056-46079 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2007-10-11 | |
| 46080-47103 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2008-03-27 | |
| 47104-48127 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2008-04-07 | |
| 48128-49151 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2008-09-09 | |
| 49152-50175 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2009-03-06 | |
| 50176-51199 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2009-03-06 | |
| 51200-52223 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2009-03-06 | |
| 52224-53247 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2009-03-11 | |
| 53248-54271 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2009-04-21 | |
| 54272-55295 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2009-04-21 | |
| 55296-56319 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2009-09-02 | |
| 56320-57343 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2011-01-04 | |
| 57344-58367 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2011-01-04 | |
| 58368-59391 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2011-08-09 | |
| 59392-60415 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2012-03-21 | |
| 60416-61439 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2012-03-21 | |
| 61440-61951 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2013-06-11 | |
| 61952-62463 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2013-09-09 | |
| 62464-63487 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2013-05-30 | |
| 63488-63999 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2013-09-11 | |
| 64000-64098 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2014-09-02 | |
| 64099-64197 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2014-09-05 | |
| 64198-64296 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2015-04-29 | |
| 64297-64395 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2016-05-25 | |
| 64396-64495 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2016-07-29 | |
| 64496-64511 | Reserved for use in documentation and sample code | [RFC5398] | 2008-12-03 | ||
| 64512-65534 | Reserved for Private Use | [RFC6996] | |||
| 65535 | Reserved | [RFC7300] |
32-bit Autonomous System Numbers
- Registration Procedure(s)
-
RIR request to the IANA or IETF Review. Allocated following the Global Policy published at [http://www.icann.org/en/resources/policy/global-addressing].
- Reference
- [RFC1930][RFC5398][RFC6793][RFC6996][RFC7249]
- Available Formats
-
CSV
| Number | Description | WHOIS | RDAP | Reference | Registration Date |
|---|---|---|---|---|---|
| 0-65535 | See Sub-registry 16-bit AS numbers | [RFC1930] | |||
| 65536-65551 | Reserved for use in documentation and sample code | [RFC5398] | 2008-12-03 | ||
| 65552-131071 | Reserved | ||||
| 131072-132095 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2006-11-29 | |
| 132096-133119 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2011-08-09 | |
| 133120-133631 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2013-09-11 | |
| 133632-134556 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2014-09-02 | |
| 134557-135580 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2014-09-02 | |
| 135581-136505 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2016-05-25 | |
| 136506-137529 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2016-05-25 | |
| 137530-138553 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2017-12-07 | |
| 138554-139577 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2017-12-07 | |
| 139578-140601 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2019-06-12 | |
| 140602-141625 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2019-06-12 | |
| 141626-142649 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2020-10-20 | |
| 142650-143673 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2020-10-20 | |
| 143674-144697 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2021-05-05 | |
| 144698-145721 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2021-05-05 | |
| 145722-146745 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2021-05-05 | |
| 146746-147769 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2021-05-05 | |
| 147770-148793 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2021-10-11 | |
| 148794-149817 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2021-10-11 | |
| 149818-150841 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2021-10-11 | |
| 150842-151865 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2021-10-11 | |
| 151866-152889 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2023-05-10 | |
| 152890-153913 | Assigned by APNIC | whois.apnic.net | https://rdap.apnic.net/ | 2023-05-10 | |
| 153914-196607 | Unallocated | ||||
| 196608-197631 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2006-11-29 | |
| 197632-198655 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2011-01-04 | |
| 198656-199679 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2012-03-21 | |
| 199680-200191 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2013-09-09 | |
| 200192-201215 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2014-02-28 | |
| 201216-202239 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2014-02-28 | |
| 202240-203263 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2015-06-11 | |
| 203264-204287 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2015-06-11 | |
| 204288-205211 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2016-07-29 | |
| 205212-206235 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2016-07-29 | |
| 206236-207259 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2016-07-29 | |
| 207260-208283 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2018-08-20 | |
| 208284-209307 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2018-08-20 | |
| 209308-210331 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2018-08-20 | |
| 210332-211355 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2020-04-01 | |
| 211356-212379 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2020-04-01 | |
| 212380-213403 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2020-04-01 | |
| 213404-214427 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2023-08-10 | |
| 214428-215451 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2023-08-10 | |
| 215452-216475 | Assigned by RIPE NCC | whois.ripe.net | https://rdap.db.ripe.net/ | 2023-08-10 | |
| 216476-262143 | Unallocated | ||||
| 262144-263167 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2006-11-29 | |
| 263168-263679 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2013-06-11 | |
| 263680-264604 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2014-09-05 | |
| 264605-265628 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2014-09-05 | |
| 265629-266652 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2016-09-08 | |
| 266653-267676 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2017-07-21 | |
| 267677-268700 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2017-07-21 | |
| 268701-269724 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2018-12-07 | |
| 269725-270748 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2018-12-07 | |
| 270749-271772 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2020-05-18 | |
| 271773-272796 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2020-05-18 | |
| 272797-273820 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2021-12-07 | |
| 273821-274844 | Assigned by LACNIC | whois.lacnic.net | https://rdap.lacnic.net/rdap/ | 2024-03-22 | |
| 274845-327679 | Unallocated | ||||
| 327680-328703 | Assigned by AFRINIC | whois.afrinic.net | https://rdap.afrinic.net/rdap/ http://rdap.afrinic.net/rdap/ |
2006-11-29 | |
| 328704-329727 | Assigned by AFRINIC | whois.afrinic.net | https://rdap.afrinic.net/rdap/ http://rdap.afrinic.net/rdap/ |
2020-03-05 | |
| 329728-393215 | Unallocated | ||||
| 393216-394239 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2006-11-30 | |
| 394240-395164 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2015-04-29 | |
| 395165-396188 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2016-05-03 | |
| 396189-397212 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2016-05-03 | |
| 397213-398236 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2018-08-09 | |
| 398237-399260 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2018-08-09 | |
| 399261-400284 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2020-11-02 | |
| 400285-401308 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2020-11-02 | |
| 401309-402332 | Assigned by ARIN | whois.arin.net | https://rdap.arin.net/registry http://rdap.arin.net/registry |
2024-04-10 | |
| 402333-4199999999 | Unallocated | ||||
| 4200000000-4294967294 | Reserved for Private Use | [RFC6996] | |||
| 4294967295 | Reserved | [RFC7300] |
Contact Information
| ID | Name | Contact URI | Last Updated |
|---|---|---|---|
| [AFRINIC] | AFRINIC | mailto:hostmaster&afrinic.net | 2013-09-09 |
| [APNIC] | APNIC | mailto:helpdesk&apnic.net | 2013-09-09 |
| [ARIN] | ARIN | mailto:hostmaster&arin.net | 2013-09-09 |
| [LACNIC] | LACNIC | mailto:hostmaster&lacnic.net | 2013-09-09 |
| [RIPE_NCC] | RIPE NCC | mailto:ncc&ripe.net | 2013-09-09 |