Autonomous System (AS) Numbers
2023-08-10
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.
16-bit Autonomous System Numbers
RIR request to the IANA or IETF Review. Allocated following the Global Policy published at
.
0
Reserved
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
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
2008-12-03
64512-65534
Reserved for Private Use
65535
Reserved
32-bit Autonomous System Numbers
RIR request to the IANA or IETF Review. Allocated following the Global Policy published at
.
0-65535
See Sub-registry 16-bit AS numbers
65536-65551
Reserved for use in documentation and sample code
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
273821-327679
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
401309-4199999999
Unallocated
4200000000-4294967294
Reserved for Private Use
4294967295
Reserved
AFRINIC
mailto:hostmaster&afrinic.net
2013-09-09
APNIC
mailto:helpdesk&apnic.net
2013-09-09
ARIN
mailto:hostmaster&arin.net
2013-09-09
LACNIC
mailto:hostmaster&lacnic.net
2013-09-09
RIPE NCC
mailto:ncc&ripe.net
2013-09-09