Autonomous System

AS21547 FirstLight Networks, LLC

ISPActiveUnited StatesARIN

AS21547 (OXNET) is an ISP network operated by FirstLight Networks, LLC in United States, registered with ARIN. It has 53 IPv4 prefixes with 88,832 addresses and 5 IPv6 prefixes, which makes it the 2,504th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses88,832in 53 prefixes
IPv6 prefixes5≈ 1.6 × 10²⁹ addresses
Size rank#2,504of 82,200 active ASNs
Abuser scoreVery Low0.04% of its addresses flagged · method

Details

OrganizationFirstLight Networks, LLC
AS nameOXNET
Websitefirstlight.net
Country United States (US)
Network typeISP
RegistryARIN
Abuse contactipabuse@firstlight.net
Registered2001-05-21
Last updated2026-04-22

IPv4 prefixes

53 prefixes · 88,832 addresses
NetworkAddressesFirst – last address
64.140.192.0/1816,38464.140.192.0 – 64.140.255.255
64.140.224.0/198,19264.140.224.0 – 64.140.255.255
66.186.160.0/198,19266.186.160.0 – 66.186.191.255
66.231.192.0/198,19266.231.192.0 – 66.231.223.255
69.49.128.0/198,19269.49.128.0 – 69.49.159.255
72.12.64.0/198,19272.12.64.0 – 72.12.95.255
72.55.224.0/198,19272.55.224.0 – 72.55.255.255
69.168.0.0/204,09669.168.0.0 – 69.168.15.255
74.220.224.0/204,09674.220.224.0 – 74.220.239.255
63.127.192.0/212,04863.127.192.0 – 63.127.199.255
66.231.220.0/221,02466.231.220.0 – 66.231.223.255
69.49.140.0/2351269.49.140.0 – 69.49.141.255
72.12.76.0/2351272.12.76.0 – 72.12.77.255
72.12.94.0/2351272.12.94.0 – 72.12.95.255
72.55.248.0/2351272.55.248.0 – 72.55.249.255
72.55.254.0/2351272.55.254.0 – 72.55.255.255
64.140.199.0/2425664.140.199.0 – 64.140.199.255
64.140.224.0/2425664.140.224.0 – 64.140.224.255
64.140.225.0/2425664.140.225.0 – 64.140.225.255
64.140.234.0/2425664.140.234.0 – 64.140.234.255
64.140.246.0/2425664.140.246.0 – 64.140.246.255
66.186.162.0/2425666.186.162.0 – 66.186.162.255
66.186.163.0/2425666.186.163.0 – 66.186.163.255
66.186.171.0/2425666.186.171.0 – 66.186.171.255
66.186.173.0/2425666.186.173.0 – 66.186.173.255
The 25 largest of 53. The API and the database have all of them.

IPv6 prefixes

5 prefixes
  • 2001:4940::/32
  • 2604:3f00::/32
  • 2001:4940:2001::/48
  • 2001:4940:2006::/48
  • 2001:4940:2007::/48

Query AS21547 with the API

The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day. 

curl "https://api.ipapi.is/?q=AS21547&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS21547, with or without a key:

curl "https://api.ipapi.is/?q=64.140.192.1"

Other networks of FirstLight Networks, LLC

AS13536 FirstLight Networks, LLC338,432 IPv4 addressesAS5738 FirstLight Networks, LLC65,536 IPv4 addressesAS27382 FirstLight Networks, LLC34,560 IPv4 addressesAS14477 FirstLight Networks, LLC14,848 IPv4 addressesAS15320 FirstLight Networks, LLC13,056 IPv4 addresses

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