HTTPfy

AS1530 Headquarters, USAISC

DNIC-ASBLK-01529-01530 - Headquarters, USAISC · registered in the United States

IPv4 addresses131,07236 prefixes · 0.004% of announced IPv4
Rank in United States#522largest network in US by IPv4 space, of 18,338 · <0.01% of US
Rank worldwide#1,569of 79,396 networks with IPv4
IPv6256 x /481 prefixes
CountryUnited States18,679 ASNs registered there
Open AS1530 in ASN lookup Look up an IP in this network (55.20.0.1) All networks in United States

IPv4 prefixes

All 36 prefixes, in address order.

  • 55.20.0.0/21
  • 55.20.8.0/21
  • 55.20.16.0/20
  • 55.20.32.0/23
  • 55.20.34.0/23
  • 55.20.36.0/22
  • 55.20.40.0/21
  • 55.20.48.0/20
  • 55.20.64.0/20
  • 55.20.80.0/21
  • 55.20.88.0/23
  • 55.20.90.0/23
  • 55.20.92.0/22
  • 55.20.96.0/19
  • 55.20.128.0/17
  • 55.71.0.0/20
  • 55.71.16.0/22
  • 55.71.20.0/22
  • 55.71.24.0/21
  • 55.71.32.0/19
  • 55.71.64.0/22
  • 55.71.68.0/23
  • 55.71.70.0/23
  • 55.71.72.0/21
  • 55.71.80.0/20
  • 55.71.96.0/22
  • 55.71.100.0/22
  • 55.71.104.0/21
  • 55.71.112.0/20
  • 55.71.128.0/19
  • 55.71.160.0/21
  • 55.71.168.0/23
  • 55.71.170.0/23
  • 55.71.172.0/22
  • 55.71.176.0/20
  • 55.71.192.0/18

IPv6 prefixes

All 1 prefix.

  • 2608:14b:2400::/40

Other ASNs named Headquarters, USAISC

26 other networks use the same organisation name; together with AS1530 they announce 9,863,936 IPv4 addresses.

ASNNameIPv4 addresses
AS1540DNIC-ASBLK-01534-01546 - Headquarters, USAISC US7,430,144
AS4010DNIC-AS-04010 - Headquarters, USAISC US1,175,808
AS1637DNIC-AS-01637 - Headquarters, USAISC US201,728
AS1602DNIC-AS-01602 - Headquarters, USAISC US199,936
AS1649DNIC-AS-01649 - Headquarters, USAISC US131,584
AS1493DNIC-ASBLK-01492-01493 - Headquarters, USAISC US119,808
AS289DNIC-AS-00289 - Headquarters, USAISC US88,320
AS1516DNIC-ASBLK-01513-01518 - Headquarters, USAISC US86,016
AS13DNIC-AS-00013 - Headquarters, USAISC US79,104
AS252DNIC-AS-00252 - Headquarters, USAISC US69,120
AS747DNIC-AS-00747 - Headquarters, USAISC US68,864
AS1501DNIC-ASBLK-01500-01502 - Headquarters, USAISC US41,984
AS213DNIC-AS-00213 - Headquarters, USAISC US32,768
AS588DIRECTRON - Headquarters, USAISC US4,096
AS153CTNOSC-ASN-153 - Headquarters, USAISC US512
AS258BRAGGSRI-EGP-AS - Headquarters, USAISC US512
AS538DNIC-AS-00538 - Headquarters, USAISC US512
AS1544DNIC-ASBLK-01534-01546 - Headquarters, USAISC US512
AS1508DNIC-AS-01508 - Headquarters, USAISC US256
AS670DNIC-AS-00670 - Headquarters, USAISC US256
AS672DNIC-AS-00672 - Headquarters, USAISC US256
AS673DNIC-AS-00673 - Headquarters, USAISC US256
AS1492DNIC-ASBLK-01492-01493 - Headquarters, USAISC US256
AS1523DNIC-ASBLK-01522-01526 - Headquarters, USAISC US256
AS575DNIC-AS-00575 - Headquarters, USAISC USIPv6 only
AS1542DNIC-ASBLK-01534-01546 - Headquarters, USAISC USIPv6 only

Similar-sized networks in United States

ASNNameIPv4 addresses
AS365#519 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD)131,072
AS368#520 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD)131,072
AS369#521 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD)131,072
AS16519#523 CUDENVER - University of Colorado Denver131,072
AS14702#524 INL-ASN2 - Idaho National Laboratory131,072
AS33442#525 ZEBRA-TECHNOLOGIES-BGP-AS-NUMBER - Zebra Technologies Corporation131,072

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources