AS54113 Fastly, Inc.

Every prefix the ASN database assigns to AS54113, 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	AS54113
Operator	Fastly, Inc.
Operator type	a hosting or cloud operator
Registry	ARIN
Registry country	US
Allocated	2011-10-04
Prefixes	112 IPv4, 325 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 (112)

23.154.64.0/24
23.185.0.0/24
23.235.36.0/22
23.235.32.0/23
23.235.35.0/24
23.235.44.0/22
23.235.42.0/23
23.235.40.0/24
43.249.72.0/22
45.56.195.0/24
45.58.212.0/22
45.58.232.0/21
45.58.240.0/22
63.141.63.0/24
63.245.216.0/22
63.245.220.0/23
63.245.222.0/24
64.251.201.0/24
66.43.1.0/24
66.211.168.0/24
87.81.224.0/19
103.245.222.0/24
104.156.80.0/21
104.156.90.0/23
104.156.89.0/24
104.156.92.0/23
104.156.94.0/24
104.238.251.0/24
104.244.43.0/24
140.248.128.0/17
140.248.0.0/18
140.248.68.0/22
140.248.66.0/23
140.248.65.0/24
140.248.72.0/22
140.248.78.0/23
140.248.77.0/24
140.248.84.0/22
140.248.82.0/23
140.248.80.0/24
140.248.88.0/22
140.248.97.0/24
140.248.98.0/24
140.248.104.0/22
140.248.108.0/23
140.248.110.0/24
140.248.112.0/21
140.248.120.0/22
140.248.124.0/23
146.75.0.0/16
149.143.160.0/23
149.143.171.0/24
149.143.184.0/22
151.101.0.0/16
157.52.72.0/21
157.52.64.0/22
157.52.68.0/23
157.52.80.0/23
157.52.83.0/24
157.52.84.0/23
157.52.87.0/24
157.52.88.0/22
157.52.92.0/24
157.52.95.0/24
157.52.96.0/22
157.52.100.0/23
157.52.103.0/24
157.52.104.0/23
157.52.106.0/24
157.52.110.0/23
157.52.109.0/24
157.52.116.0/22
157.52.112.0/24
157.52.114.0/24
157.52.122.0/23
157.52.121.0/24
157.52.124.0/23
157.52.126.0/24
159.242.243.0/24
162.219.224.0/22
162.247.243.0/24
167.82.0.0/17
167.82.132.0/22
167.82.130.0/23
167.82.136.0/22
167.82.142.0/23
167.82.141.0/24
167.82.160.0/22
167.82.166.0/23
167.82.164.0/24
167.82.168.0/23
167.82.171.0/24
167.82.172.0/23
167.82.228.0/22
167.82.224.0/23
167.82.227.0/24
167.82.236.0/22
167.82.232.0/23
167.82.235.0/24
172.111.64.0/18

100 of 112 shown; the API answers up to 112 and the whole count.

IPv6 prefixes (325)

2001:df0:45f::/48
2401:7c60:1::/48
2602:816:5001::/48
2606:2cc0::/46
2606:50c0:8000::/46
2620:0:890::/48
2620:11a:c004::/48
2620:11a:c010::/48
2620:11a:c012::/48
2620:11a:c014::/48
2620:11a:c016::/48
2620:11a:c018::/46
2620:11a:c01c::/47
2620:11a:c020::/48
2620:12a:8000::/44
2a00:8c40:f000::/44
2a00:8c40:f030::/44
2a00:8c40:f0c0::/42
2a00:8c40:f0a0::/43
2a00:8c40:f090::/44
2a00:8c40:f140::/42
2a00:8c40:f120::/43
2a00:8c40:f1c0::/42
2a00:8c40:f180::/44
2a00:8c40:f1b0::/44
2a04:4e40::/48
2a04:4e40:40::/44
2a04:4e40:100::/44
2a04:4e40:200::/48
2a04:4e40:210::/48
2a04:4e40:220::/48
2a04:4e40:230::/48
2a04:4e40:240::/44
2a04:4e40:2f0::/48
2a04:4e40:300::/44
2a04:4e40:410::/44
2a04:4e40:400::/48
2a04:4e40:430::/48
2a04:4e40:440::/48
2a04:4e40:4f0::/48
2a04:4e40:500::/44
2a04:4e40:600::/48
2a04:4e40:640::/48
2a04:4e40:6f0::/48
2a04:4e40:700::/44
2a04:4e40:800::/48
2a04:4e40:840::/44
2a04:4e40:900::/44
2a04:4e40:a20::/43
2a04:4e40:a10::/44
2a04:4e40:a00::/48
2a04:4e40:a40::/43
2a04:4e40:af0::/48
2a04:4e40:b00::/44
2a04:4e40:d00::/44
2a04:4e40:e00::/48
2a04:4e40:e10::/48
2a04:4e40:e20::/48
2a04:4e40:e40::/44
2a04:4e40:f00::/48
2a04:4e40:f10::/48
2a04:4e40:f40::/48
2a04:4e40:1000::/48
2a04:4e40:1010::/48
2a04:4e40:1030::/44
2a04:4e40:1020::/48
2a04:4e40:1040::/44
2a04:4e40:1050::/48
2a04:4e40:10f0::/48
2a04:4e40:1100::/48
2a04:4e40:1110::/48
2a04:4e40:1140::/48
2a04:4e40:1200::/48
2a04:4e40:1220::/44
2a04:4e40:1240::/44
2a04:4e40:1300::/44
2a04:4e40:1500::/44
2a04:4e40:1600::/48
2a04:4e40:1620::/44
2a04:4e40:1640::/44
2a04:4e40:16f0::/48
2a04:4e40:1700::/48
2a04:4e40:1720::/44
2a04:4e40:1740::/48
2a04:4e40:17f0::/48
2a04:4e40:1800::/48
2a04:4e40:1830::/44
2a04:4e40:1840::/44
2a04:4e40:1850::/48
2a04:4e40:18f0::/48
2a04:4e40:1900::/44
2a04:4e40:1a00::/44
2a04:4e40:1b00::/44
2a04:4e40:1c20::/43
2a04:4e40:1c40::/44
2a04:4e40:1d00::/44
2a04:4e40:1e00::/44
2a04:4e40:1f00::/44
2a04:4e40:2000::/48
2a04:4e40:2030::/44

100 of 325 shown; the API answers up to 325 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, 437 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/54113 \
  -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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