AS4621 Office of Info.Tech. Admin. for Educational Development

Every prefix the ASN database assigns to AS4621, the operator behind it, the registry that allocated the system and when, and what the operator lists say about it. Facts about a network, read from data held on this server — never about whoever is using an address today.

The system at a glance

Number	AS4621
Operator	Office of Info.Tech. Admin. for Educational Development
Operator type	not settled by the operator name
Registry	APNIC
Registry country	TH
Allocated	1995-08-16
Prefixes	91 IPv4, 139 IPv6
Threat blocklist	not listed
Satellite ISP	not listed
Mobile carrier	not listed

The flags are what the lookup applies to every address of the system: Spamhaus ASN-DROP names operators behind hijacked or leased netblocks, and the satellite and mobile lists are curated and positive-only, so "not listed" means exactly that and never a guess.

IPv4 prefixes (91)

103.1.160.0/22
182.93.192.0/18
202.28.2.0/23
202.28.0.0/24
202.28.20.0/22
202.28.18.0/23
202.28.28.0/22
202.28.36.0/22
202.28.52.0/23
202.28.55.0/24
202.28.56.0/22
202.28.61.0/24
202.28.63.0/24
202.28.65.0/24
202.28.76.0/22
202.28.84.0/22
202.28.82.0/23
202.28.104.0/21
202.28.96.0/22
202.28.120.0/21
202.28.112.0/22
202.28.192.0/19
202.28.224.0/20
202.28.240.0/22
202.28.252.0/22
202.29.0.0/22
202.29.5.0/24
202.29.7.0/24
202.29.14.0/23
202.29.13.0/24
202.29.17.0/24
202.29.19.0/24
202.29.20.0/23
202.29.25.0/24
202.29.27.0/24
202.29.28.0/23
202.29.31.0/24
202.29.40.0/21
202.29.34.0/23
202.29.36.0/24
202.29.38.0/24
202.29.48.0/22
202.29.54.0/23
202.29.52.0/24
202.29.56.0/24
202.29.59.0/24
202.29.62.0/23
202.29.61.0/24
202.29.67.0/24
202.29.68.0/23
202.29.71.0/24
202.29.72.0/22
202.29.78.0/23
202.29.76.0/24
202.29.84.0/23
202.29.87.0/24
202.29.90.0/23
202.29.89.0/24
202.29.94.0/23
202.29.92.0/24
202.29.112.0/20
202.29.96.0/23
202.29.99.0/24
202.29.100.0/23
202.29.102.0/24
202.29.105.0/24
202.29.107.0/24
202.29.110.0/23
202.29.192.0/18
202.29.128.0/20
202.29.152.0/21
202.29.160.0/21
202.29.168.0/22
202.29.184.0/21
202.29.180.0/22
202.44.128.0/24
202.44.138.0/23
203.158.132.0/22
203.158.136.0/22
203.158.150.0/23
203.158.156.0/22
203.158.154.0/23
203.158.153.0/24
203.159.192.0/18
203.159.128.0/19
203.159.176.0/20
203.159.168.0/21
203.159.162.0/23
203.159.161.0/24
203.159.166.0/23
203.159.165.0/24

IPv6 prefixes (139)

2001:3c8:4000::/34
2001:3c8:800::/37
2001:3c8:400::/38
2001:3c8::/39
2001:3c8:300::/40
2001:3c8:280::/41
2001:3c8:200::/42
2001:3c8:260::/43
2001:3c8:250::/44
2001:3c8:248::/45
2001:3c8:244::/46
2001:3c8:240::/47
2001:3c8:242::/48
2001:3c8:1800::/37
2001:3c8:1000::/39
2001:3c8:1280::/41
2001:3c8:1240::/42
2001:3c8:1220::/43
2001:3c8:1210::/44
2001:3c8:1208::/45
2001:3c8:1204::/46
2001:3c8:1200::/47
2001:3c8:1203::/48
2001:3c8:1380::/41
2001:3c8:1340::/42
2001:3c8:1320::/43
2001:3c8:1310::/44
2001:3c8:1308::/45
2001:3c8:1300::/47
2001:3c8:1302::/48
2001:3c8:1304::/47
2001:3c8:1307::/48
2001:3c8:1500::/40
2001:3c8:1480::/41
2001:3c8:1440::/42
2001:3c8:1420::/43
2001:3c8:1410::/44
2001:3c8:1404::/46
2001:3c8:1402::/47
2001:3c8:1400::/48
2001:3c8:140c::/46
2001:3c8:140a::/47
2001:3c8:1409::/48
2001:3c8:1700::/40
2001:3c8:1680::/41
2001:3c8:1640::/42
2001:3c8:1620::/43
2001:3c8:1610::/44
2001:3c8:1608::/45
2001:3c8:1600::/46
2001:3c8:1604::/47
2001:3c8:1607::/48
2001:3c8:3000::/36
2001:3c8:2800::/37
2001:3c8:2000::/38
2001:3c8:2400::/39
2001:3c8:2600::/40
2001:3c8:2780::/41
2001:3c8:2740::/42
2001:3c8:2720::/43
2001:3c8:2710::/44
2001:3c8:2708::/45
2001:3c8:2700::/46
2001:3c8:2704::/47
2001:3c8:2706::/48
2001:3c8:8000::/36
2001:3c8:9800::/37
2001:3c8:9400::/38
2001:3c8:9200::/39
2001:3c8:9100::/40
2001:3c8:9080::/41
2001:3c8:9040::/42
2001:3c8:9020::/43
2001:3c8:9010::/44
2001:3c8:9000::/45
2001:3c8:900c::/46
2001:3c8:900a::/47
2001:3c8:9008::/48
2001:3c8:b000::/36
2001:3c8:a800::/37
2001:3c8:a000::/38
2001:3c8:a400::/39
2001:3c8:a600::/40
2001:3c8:a780::/41
2001:3c8:a740::/42
2001:3c8:a720::/43
2001:3c8:a710::/44
2001:3c8:a708::/45
2001:3c8:a704::/46
2001:3c8:a700::/48
2001:3c8:a703::/48
2001:3c8:c400::/38
2001:3c8:c000::/39
2001:3c8:c200::/40
2001:3c8:c380::/41
2001:3c8:c340::/42
2001:3c8:c320::/43
2001:3c8:c310::/44
2001:3c8:c308::/45
2001:3c8:c304::/46

100 of 139 shown; the API answers up to 139 and the whole count.

The same facts from the API

One call answers the operator, the registry facts, the flags, the prefix counts and up to 500 prefixes per family, 230 in total for this system. It costs one credit, and a repeat inside seven days is free.

$ curl https://spaw.co/api/v1/ip/asn/4621 \
  -H "Authorization: Bearer $SPAW_KEY"

How to read this page

The prefixes are what the free DB-IP ASN database assigns to the system, walked once a month into an index on this server — a database, not a live route table, so a prefix announced yesterday appears at the next build. The registry facts are the regional registries' own daily statistics. None of it says who is behind an address today: a carrier's prefix carries thousands of people, and a hosting operator's carries whatever its customers run.

More networks

asn-prefixes 2026-09-12 · dbip-asn-lite 2026-09-01 · rir-allocations 2026-09-12 · threat-blocklists 2026-09-12 · satellite-asns 2026-09-12 · mobile-carrier-asns 2026-09-12 · index built 2026-09-12

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