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AS21547 FirstLight Fiber, Inc.

OXNET - FirstLight Fiber, Inc. · registered in the United States

IPv4 addresses64,00085 prefixes · 0.002% of announced IPv4
Rank in United States#1,356largest network in US by IPv4 space, of 18,338 · <0.01% of US
Rank worldwide#3,545of 79,396 networks with IPv4
IPv62 x /32 (131,072 x /48)17 prefixes
CountryUnited States18,679 ASNs registered there
Open AS21547 in ASN lookup Look up an IP in this network (63.127.192.1) All networks in United States

IPv4 prefixes

All 85 prefixes, in address order.

  • 63.127.192.0/21
  • 64.140.192.0/21
  • 64.140.200.0/21
  • 64.140.208.0/23
  • 64.140.211.0/24
  • 64.140.212.0/22
  • 64.140.216.0/21
  • 64.140.224.0/21
  • 64.140.232.0/23
  • 64.140.234.0/24
  • 64.140.235.0/24
  • 64.140.236.0/22
  • 64.140.240.0/22
  • 64.140.245.0/24
  • 64.140.246.0/24
  • 64.140.247.0/24
  • 64.140.248.0/21
  • 66.186.160.0/22
  • 66.186.164.0/23
  • 66.186.166.0/24
  • 66.186.168.0/22
  • 66.186.172.0/23
  • 66.186.174.0/23
  • 66.186.176.0/24
  • 66.186.178.0/23
  • 66.186.180.0/22
  • 66.186.184.0/24
  • 66.186.185.0/24
  • 66.186.186.0/23
  • 66.186.188.0/24
  • 66.186.189.0/24
  • 66.186.190.0/23
  • 66.231.192.0/22
  • 66.231.197.0/24
  • 66.231.198.0/23
  • 66.231.200.0/24
  • 66.231.202.0/23
  • 66.231.204.0/23
  • 66.231.208.0/21
  • 66.231.217.0/24
  • 66.231.219.0/24
  • 66.231.220.0/22
  • 69.49.128.0/23
  • 69.49.130.0/23
  • 69.49.132.0/23
  • 69.49.134.0/23
  • 69.49.136.0/22
  • 69.49.140.0/23
  • 69.49.142.0/23
  • 69.49.144.0/24
  • 69.49.145.0/24
  • 69.49.146.0/24
  • 69.49.147.0/24
  • 69.49.148.0/24
  • 69.49.149.0/24
  • 69.49.150.0/23
  • 69.49.152.0/23
  • 69.49.154.0/23
  • 69.49.156.0/23
  • 69.168.0.0/20
  • 72.12.64.0/20
  • 72.12.80.0/24
  • 72.12.81.0/24
  • 72.12.82.0/24
  • 72.12.84.0/22
  • 72.12.88.0/21
  • 72.55.224.0/22
  • 72.55.228.0/23
  • 72.55.232.0/24
  • 72.55.240.0/22
  • 72.55.247.0/24
  • 72.55.248.0/23
  • 72.55.250.0/23
  • 72.55.252.0/24
  • 72.55.254.0/23
  • 74.220.224.0/21
  • 74.220.232.0/22
  • 74.220.236.0/24
  • 74.220.237.0/24
  • 74.220.238.0/23
  • 140.165.50.0/24
  • 198.212.225.0/24
  • 198.212.226.0/24
  • 198.212.230.0/24
  • 208.0.176.0/21

IPv6 prefixes

All 17 prefixes.

  • 2001:4940::/35
  • 2001:4940:2000::/47
  • 2001:4940:2002::/47
  • 2001:4940:2004::/46
  • 2001:4940:2008::/45
  • 2001:4940:2010::/44
  • 2001:4940:2020::/43
  • 2001:4940:2040::/42
  • 2001:4940:2080::/41
  • 2001:4940:2100::/40
  • 2001:4940:2200::/39
  • 2001:4940:2400::/38
  • 2001:4940:2800::/37
  • 2001:4940:3000::/36
  • 2001:4940:4000::/34
  • 2001:4940:8000::/33
  • 2604:3f00::/32

Other ASNs named FirstLight Fiber, Inc.

7 other networks use the same organisation name; together with AS21547 they announce 501,984 IPv4 addresses.

ASNNameIPv4 addresses
AS13536TVC-AS1 - FirstLight Fiber, Inc. US312,064
AS5738SOVER-ASN - FirstLight Fiber, Inc. US59,616
AS27382COLOSPACE - FirstLight Fiber, Inc. US32,256
AS14477FLTG - FirstLight Fiber, Inc. US13,824
AS15320PRIMELINK - FirstLight Fiber, Inc. US12,032
AS14877FL-14877 - FirstLight Fiber, Inc. US6,656
AS62929186-ASN - FirstLight Fiber, Inc. US1,536

Similar-sized networks in United States

ASNNameIPv4 addresses
AS4531#1353 MEDWEB - Nexsys Electronics, Inc.64,256
AS12013#1354 FAUNET - Florida Atlantic University64,256
AS27185#1355 DHS-INTERNET - Danbury Hospital - ITG64,256
AS7328#1357 CHOP - The Children's Hospital of Philadelphia64,000
AS7973#1358 MAYO - Mayo Foundation for Medical Education and Research64,000
AS11798#1359 ACEDATACENTERS-AS-1 - Ace Data Centers, Inc.64,000

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