AS3477 National Oceanic and Atmospheric Administration

NOAA-NWAVE - National Oceanic and Atmospheric Administration · registered in the United States

IPv4 addresses321,28093 prefixes · 0.010% of announced IPv4

Rank in United States#220largest network in US by IPv4 space, of 18,338 · 0.02% of US

Rank worldwide#771of 79,396 networks with IPv4

IPv68 x /32 (525,951 x /48)38 prefixes

CountryUnited States18,679 ASNs registered there

Open AS3477 in ASN lookup Look up an IP in this network (137.75.64.1) All networks in United States

IPv4 prefixes

All 93 prefixes, in address order.

137.75.64.0/20
137.75.80.0/23
137.75.82.0/24
137.75.83.0/24
137.75.84.0/22
137.75.88.0/21
137.75.96.0/21
137.75.104.0/23
137.75.106.0/24
137.75.107.0/24
137.75.108.0/22
137.75.112.0/21
137.75.120.0/23
137.75.123.0/24
137.75.224.0/22
140.90.0.0/20
140.90.16.0/21
140.90.24.0/22
140.90.28.0/24
140.90.29.0/24
140.90.30.0/23
140.90.32.0/19
140.90.64.0/19
140.90.96.0/22
140.90.100.0/23
140.90.102.0/23
140.90.104.0/21
140.90.112.0/20
140.90.128.0/19
140.90.160.0/20
140.90.176.0/21
140.90.184.0/22
140.90.188.0/23
140.90.190.0/24
140.90.191.0/24
140.90.192.0/18
140.172.0.0/16
140.208.192.0/20
140.208.252.0/23
140.208.254.0/23
151.207.8.0/23
151.207.12.0/23
155.206.0.0/16
161.55.0.0/19
161.55.32.0/20
161.55.48.0/21
161.55.56.0/23
161.55.58.0/23
161.55.60.0/22
161.55.64.0/18
161.55.128.0/18
161.55.192.0/19
161.55.224.0/24
161.55.225.0/24
161.55.226.0/23
161.55.228.0/22
161.55.232.0/21
161.55.240.0/20
165.92.182.0/24
165.92.184.0/24
165.92.186.0/23
165.92.188.0/24
165.92.222.0/24
192.35.128.0/23
192.58.1.0/24
192.58.2.0/23
192.67.97.0/24
192.67.134.0/24
192.94.173.0/24
192.111.123.0/24
192.133.29.0/24
192.153.129.0/24
198.51.11.0/24
198.180.147.0/24
198.206.32.0/19
199.104.104.0/24
199.242.231.0/24
199.242.232.0/23
204.145.202.0/24
204.193.241.0/24
204.193.242.0/23
204.193.244.0/22
204.228.175.0/24
204.228.176.0/20
205.156.0.0/19
205.156.32.0/20
205.156.48.0/21
205.156.61.0/24
205.156.62.0/23
205.159.118.0/24
205.166.33.0/24
205.167.24.0/23
206.197.238.0/24

IPv6 prefixes

All 38 prefixes.

2601:a000::/32
2601:a002::/42
2601:a002:40::/43
2601:a002:60::/43
2601:a002:80::/41
2601:a002:100::/40
2601:a002:200::/39
2601:a002:400::/38
2601:a002:800::/37
2601:a002:1000::/36
2601:a002:2000::/35
2601:a002:4000::/34
2601:a002:8000::/33
2601:a004::/31
2601:a008::/32
2601:a010::/32
2601:a012::/31
2602:810:d004::/46
2607:9bc0:1010::/44
2607:9bc0:1020::/43
2610:20:8040::/44
2610:20:8800::/46
2610:20:8808::/45
2610:20:8810::/44
2610:20:8820::/43
2610:20:8840::/42
2610:20:8880::/41
2610:20:8900::/40
2610:20:8a00::/39
2610:20:8c00::/44
2610:20:8c20::/44
2610:20:9008::/45
2610:20:90a0::/44
2610:20:90e2::/48
2610:20:9124::/48
2610:20:9147::/48
2610:20:9200::/39
2620:12e:b000::/46

Other ASNs named National Oceanic and Atmospheric Administration

5 other networks use the same organisation name; together with AS3477 they announce 503,296 IPv4 addresses.

ASNNameIPv4 addresses

AS2648NOAA-BOULDER - National Oceanic and Atmospheric Administration US112,384

AS7764CENSUSBUREAU - National Oceanic and Atmospheric Administration US65,536

AS26100NOAA-PACIFIC-REGION-CENTER - National Oceanic and Atmospheric Administration US2,304

AS10616NTIS - National Oceanic and Atmospheric Administration US1,536

AS6629NOAA-SILVERSPRING - National Oceanic and Atmospheric Administration US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS3527#217 NIH-NET - National Institutes of Health324,608

AS8047#218 GCI - GENERAL COMMUNICATION, INC.324,352

AS29992#219 VA-TMP-CORE - U.S. Department of Veterans Affairs323,328

AS15108#221 ALLO-COMM - Allo Communications LLC317,440

AS27364#222 ACS-INTERNET - Armstrong314,880

AS13536#223 TVC-AS1 - FirstLight Fiber, Inc.312,064

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