Autonomous System details

AS3477

National Oceanic and Atmospheric Administration · noaa.gov

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AS3477 – National Oceanic and Atmospheric Administration

Field	Value
Country	United States
Website	noaa.gov
Hosted domains	26
IPv4 addresses	322,816
IPv6 addresses	635,806,729,532,463,077,965,695,025,152
ASN type	Government
Registry	arin
Allocated	32 years ago on Mar 08, 1994
Updated	5 years ago on Sep 04, 2020

Netblock	Company	Num of IPs
140.90.0.0/16	National Oceanic and Atmospheric Administration	65,536
140.172.0.0/16	National Oceanic and Atmospheric Administration	65,536
155.206.0.0/16	National Oceanic and Atmospheric Administration	65,536
161.55.0.0/16	National Oceanic and Atmospheric Administration	65,536
137.75.64.0/18	National Oceanic and Atmospheric Administration	16,384
205.156.0.0/18	National Oceanic and Atmospheric Administration	16,384
198.206.32.0/19	National Weather Service Eastern Region Headquarters	8,192
140.208.192.0/20	Office of Oceanic and Atmospheric Research - Geophysical Fluid Dynamics Laboratory	4,096
137.75.88.0/21	National Oceanic and Atmospheric Administration	2,048
137.75.68.0/22	National Oceanic and Atmospheric Administration	1,024
137.75.72.0/22	National Oceanic and Atmospheric Administration	1,024
137.75.76.0/22	National Oceanic and Atmospheric Administration	1,024
137.75.80.0/22	National Oceanic and Atmospheric Administration	1,024
137.75.84.0/22	National Oceanic and Atmospheric Administration	1,024
137.75.96.0/22	National Oceanic and Atmospheric Administration	1,024
137.75.100.0/22	National Oceanic and Atmospheric Administration	1,024
137.75.108.0/22	National Oceanic and Atmospheric Administration	1,024
137.75.112.0/22	National Oceanic and Atmospheric Administration	1,024
137.75.116.0/22	National Oceanic and Atmospheric Administration	1,024
137.75.224.0/22	National Oceanic and Atmospheric Administration	1,024
140.208.252.0/22	National Oceanic and Atmospheric Administration	1,024
161.55.56.0/23	National Oceanic and Atmospheric Administration	512
199.242.232.0/23	National Oceanic and Atmospheric Administration	512
204.193.246.0/23	U.S. Department of Commerce	512
137.75.82.0/24	National Oceanic and Atmospheric Administration	256
137.75.106.0/24	National Oceanic and Atmospheric Administration	256
137.75.120.0/24	National Oceanic and Atmospheric Administration	256
140.90.28.0/24	National Oceanic and Atmospheric Administration	256
140.90.101.0/24	National Oceanic and Atmospheric Administration	256
140.90.190.0/24	National Oceanic and Atmospheric Administration	256
140.208.253.0/24	National Oceanic and Atmospheric Administration	256
151.207.8.0/24	United States Patent and Trademark Office	256
151.207.9.0/24	United States Patent and Trademark Office	256
151.207.12.0/24	United States Patent and Trademark Office	256
151.207.13.0/24	United States Patent and Trademark Office	256
161.55.224.0/24	National Oceanic and Atmospheric Administration	256
165.92.222.0/24	National Oceanic and Atmospheric Administration	256
170.110.254.0/24	U.S. Department of Commerce, HQ and ITA	256
192.35.128.0/24	National Oceanic and Atmospheric Administration	256
192.35.129.0/24	National Oceanic and Atmospheric Administration	256
192.46.108.0/24	DOC/NOAA/NWS	256
192.58.1.0/24	National Oceanic and Atmospheric Administration	256
192.58.2.0/24	National Oceanic and Atmospheric Administration	256
192.58.3.0/24	National Oceanic and Atmospheric Administration	256
192.67.97.0/24	National Oceanic and Atmospheric Administration	256
192.67.134.0/24	National Oceanic and Atmospheric Administration	256
192.94.173.0/24	Great Lakes Environmental Research Laboratory	256
192.111.123.0/24	Atlantic Oceanographic and Meteorological Laboratory	256
192.133.29.0/24	National Oceanic and Atmospheric Administration	256
192.153.129.0/24	National Oceanic and Atmospheric Administration	256
198.51.11.0/24	National Telecommunications and Information Administration	256
198.180.147.0/24	National Oceanic and Atmospheric Administration	256
198.200.151.0/24	National Weather Service Western Region Headquarters	256
199.104.104.0/24	National Weather Service Western Region Headquarters	256
199.104.105.0/24	National Weather Service Western Region Headquarters	256
199.242.231.0/24	National Oceanic and Atmospheric Administration	256
204.145.202.0/24	National Weather Service Western Region Headquarters	256
204.193.244.0/24	U.S. Department of Commerce	256
204.193.245.0/24	U.S. Department of Commerce	256
204.228.175.0/24	National Weather Service Western Region Headquarters	256
204.228.176.0/24	National Weather Service Western Region Headquarters	256
204.228.177.0/24	National Weather Service Western Region Headquarters	256
204.228.178.0/24	National Weather Service Western Region Headquarters	256
204.228.179.0/24	National Weather Service Western Region Headquarters	256
204.228.180.0/24	National Weather Service Western Region Headquarters	256
204.228.181.0/24	National Weather Service Western Region Headquarters	256
204.228.182.0/24	National Weather Service Western Region Headquarters	256
204.228.183.0/24	National Weather Service Western Region Headquarters	256
204.228.184.0/24	National Weather Service Western Region Headquarters	256
204.228.185.0/24	National Weather Service Western Region Headquarters	256
204.228.186.0/24	National Weather Service Western Region Headquarters	256
204.228.187.0/24	National Weather Service Western Region Headquarters	256
204.228.188.0/24	National Weather Service Western Region Headquarters	256
204.228.189.0/24	National Weather Service Western Region Headquarters	256
204.228.190.0/24	National Weather Service Western Region Headquarters	256
204.228.191.0/24	National Weather Service Western Region Headquarters	256
205.159.118.0/24	U.S. Department of Commerce	256
205.166.33.0/24	National Oceanic and Atmospheric Administration	256
205.167.24.0/24	National Oceanic and Atmospheric Administration	256
205.167.25.0/24	National Oceanic and Atmospheric Administration	256
206.197.238.0/24	U.S. Department of Commerce	256

Netblock	Company
2601:a000::/32	National Oceanic and Atmospheric Administration
2601:a002::/32	National Oceanic and Atmospheric Administration
2601:a004::/32	NOAABO
2601:a005::/32	National Oceanic and Atmospheric Administration
2601:a008::/32	National Oceanic and Atmospheric Administration
2601:a010::/32	National Oceanic and Atmospheric Administration
2601:a012::/32	NOAABO
2601:a013::/32	National Oceanic and Atmospheric Administration
2610:20:8800::/38	National Oceanic and Atmospheric Administration
2610:20:9200::/40	National Oceanic and Atmospheric Administration
2610:20:9300::/40	National Oceanic and Atmospheric Administration
2607:9bc0:1010::/44	First Responder Network Authority
2610:20:8040::/44	National Oceanic and Atmospheric Administration
2610:20:8c00::/44	National Oceanic and Atmospheric Administration
2610:20:8c20::/44	National Oceanic and Atmospheric Administration
2610:20:90a0::/44	National Oceanic and Atmospheric Administration
2610:20:9008::/45	National Oceanic and Atmospheric Administration
2602:810:d004::/46	United States Patent and Trademark Office
2620:12e:b000::/46	National Telecommunications and Information Administration
2610:20:900e::/47	National Oceanic and Atmospheric Administration
2601:a002:5f::/48	National Oceanic and Atmospheric Administration
2610:20:90e0::/48	National Oceanic and Atmospheric Administration
2610:20:90e2::/48	National Oceanic and Atmospheric Administration
2610:20:9124::/48	National Oceanic and Atmospheric Administration
2610:20:9147::/48	National Oceanic and Atmospheric Administration

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WHOIS Details

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                                                ASHandle:       AS3477
                                                OrgID:          AS3477
                                                ASName:         AS3477
                                                ASNumber:       AS3477
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 26 domain names hosted across 13 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
137.75.88.7	████████	12
137.75.88.52	████████	11
140.172.200.41	████████	4
140.172.184.1	██████████	2
137.75.101.20	██████████	1
140.90.193.57	██████████	1
140.172.190.1	██████████	1
137.75.121.202	██████████	1
137.75.121.228	██████████	1
137.75.111.173	██████████	1

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Peers

There are 14 peers for this ASN.

Peers	Name
AS10871	National Oceanic and Atmospheric Administration
AS11956	National Oceanic and Atmospheric Administration
AS12076	Microsoft Corporation
AS16550	Google LLC
AS26100	National Oceanic and Atmospheric Administration
AS2648	National Oceanic and Atmospheric Administration
AS30687	National Weather Service Southern Region Headquarters
AS33343	U.S. Department of Commerce, HQ and ITA
AS3635	U.S. Department of Commerce, Bureau of Economic Analysis
AS40623	Office of Oceanic and Atmospheric Research - Geophysical Fluid Dynamics Laboratory
AS49	National Institute of Standards and Technology
AS5744	United States Patent and Trademark Office
AS6629	National Oceanic and Atmospheric Administration
AS7224	Amazon.com, Inc.

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Upstreams

There are 2 upstreams for this ASN.

upstreams	Name
AS11956	National Oceanic and Atmospheric Administration
AS26100	National Oceanic and Atmospheric Administration

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ASN API & Database

Downstreams

There are 10 downstreams for this ASN.

Downstreams	Name
AS12076	Microsoft Corporation
AS16550	Google LLC
AS2648	National Oceanic and Atmospheric Administration
AS30687	National Weather Service Southern Region Headquarters
AS33343	U.S. Department of Commerce, HQ and ITA
AS3635	U.S. Department of Commerce, Bureau of Economic Analysis
AS40623	Office of Oceanic and Atmospheric Research - Geophysical Fluid Dynamics Laboratory
AS49	National Institute of Standards and Technology
AS5744	United States Patent and Trademark Office
AS6629	National Oceanic and Atmospheric Administration

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ASN API & Database

Pingable IPs

187 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
205.156.4.133	AS3477 National Oceanic and Atmospheric Administration	`4.94ms` from Ashburn, US
140.208.200.46	AS3477 National Oceanic and Atmospheric Administration	`12.15ms` from Ashburn, US
205.156.36.45	AS3477 National Oceanic and Atmospheric Administration	`32.57ms` from Ashburn, US
205.167.25.66	AS3477 National Oceanic and Atmospheric Administration	`15.90ms` from Ashburn, US
140.172.117.1	AS3477 National Oceanic and Atmospheric Administration	`1.83ms` from Denver, US
140.172.112.37	AS3477 National Oceanic and Atmospheric Administration	`0.55ms` from Denver, US
137.75.72.13	AS3477 National Oceanic and Atmospheric Administration	`0.52ms` from Denver, US
2610:20:900c:3::2	AS3477 National Oceanic and Atmospheric Administration	`0.53ms` from Denver, US
140.172.225.13	AS3477 National Oceanic and Atmospheric Administration	`1.84ms` from Denver, US
140.172.2.133	AS3477 National Oceanic and Atmospheric Administration	`1.68ms` from Denver, US
140.90.114.196	AS3477 National Oceanic and Atmospheric Administration	`2.29ms` from Reston, US
140.90.111.34	AS3477 National Oceanic and Atmospheric Administration	`2.77ms` from Reston, US
161.55.65.36	AS3477 National Oceanic and Atmospheric Administration	`0.98ms` from Seattle, US
140.172.113.38	AS3477 National Oceanic and Atmospheric Administration	`3.16ms` from Denver, US
2601:a008:1:2::1	AS3477 National Oceanic and Atmospheric Administration	`49.25ms` from Honolulu, US
140.90.49.3	AS3477 National Oceanic and Atmospheric Administration	`39.39ms` from Lincoln, US
140.90.208.126	AS3477 National Oceanic and Atmospheric Administration	`2.48ms` from Reston, US
140.90.154.65	AS3477 National Oceanic and Atmospheric Administration	`2.90ms` from Reston, US
137.75.71.132	AS3477 National Oceanic and Atmospheric Administration	`1.70ms` from Ashburn, US
140.172.96.10	AS3477 National Oceanic and Atmospheric Administration	`1.10ms` from Denver, US
2610:20:8800:6001::a	AS3477 National Oceanic and Atmospheric Administration	`2.08ms` from Denver, US
140.208.252.48	AS3477 National Oceanic and Atmospheric Administration	`2.05ms` from Reston, US
140.90.242.34	AS3477 National Oceanic and Atmospheric Administration	`2.71ms` from Reston, US
161.55.78.66	AS3477 National Oceanic and Atmospheric Administration	`0.55ms` from Seattle, US
140.172.193.162	AS3477 National Oceanic and Atmospheric Administration	`1.99ms` from Denver, US

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
82.141.82.197	AS719 Elisa Oyj	`0.64ms` from Helsinki, FI
115.74.132.181	AS7552 Viettel Group	`1.04ms` from Ho Chi Minh City, VN
146.199.71.101	AS6871 Plusnet	`2.93ms` from London, GB
109.7.110.21	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`7.18ms` from Lyon, FR
2.138.176.21	AS3352 TELEFONICA DE ESPANA S.A.U.	`1.20ms` from Madrid, ES
92.161.227.197	AS3215 Orange S.A.	`9.61ms` from Marseille, FR
187.200.144.21	AS8151 UNINET	`8.61ms` from Mexico City, MX
173.235.16.53	AS11272 C Spire Fiber	`3.99ms` from New Orleans, US
177.104.80.21	AS28258 VERO S.A	`9.45ms` from Osasco, BR
177.81.147.197	AS28573 Claro NXT Telecomunicacoes Ltda	`4.54ms` from Osasco, BR
24.143.111.229	AS11404 Wave Broadband	`2.77ms` from Seattle, US
60.197.155.245	AS3786 LG DACOM Corporation	`1.60ms` from Seoul, KR
220.121.101.245	AS4766 Korea Telecom	`1.55ms` from Seoul, KR
118.139.205.5	AS9770 LG HelloVision Corp.	`5.39ms` from Seoul, KR
161.216.23.37	AS577 Bell Canada	`15.80ms` from Toronto, CA
86.88.217.181	AS1136 KPN B.V.	`1.36ms` from Amsterdam, NL
46.246.194.21	AS1241 Forthnet	`10.23ms` from Athens, GR
24.98.186.149	AS7922 Comcast Cable Communications, LLC	`4.56ms` from Atlanta, US
194.65.53.165	AS3243 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.	`0.85ms` from Braga, PT
182.74.119.37	AS9498 BHARTI Airtel Ltd.	`0.68ms` from Chennai, IN
185.138.56.213	AS34766 atom86 BV	`0.63ms` from Copenhagen, DK
213.251.183.85	AS16276 OVH SAS	`0.07ms` from Gravelines, FR
190.56.9.117	AS14754 TELECOMUNICACIONES DE GUATEMALA, SOCIEDAD ANONIMA	`0.60ms` from Guatemala City, GT
213.216.198.5	AS16086 DNA Oyj	`0.76ms` from Helsinki, FI
165.161.6.5	AS394700 The School District of Palm Beach County	`2.16ms` from Miami, US

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

traceroute -a -n -q1 -f5 205.156.43.2

traceroute to 205.156.43.2 (205.156.43.2): 64 hops max, 52 byte packets

5 [AS13786] 206.126.236.45 0.606 ms

6 [AS11537] 163.253.1.130 3.396 ms

7 [AS11537] 163.253.1.119 3.736 ms

8 [AS10886] 206.196.177.58 1.148 ms

9 [AS10886] 206.196.178.81 2.686 ms

10 [AS10886] 206.196.177.191 1.766 ms

11 [AS3477] 137.75.68.18 2.024 ms

12 [AS3477] 137.75.68.19 2.04 ms

13 [AS3477] 137.75.68.22 2.304 ms

14 [AS3477] 140.172.88.105 3.574 ms

15 [AS3477] 140.172.88.59 3.489 ms

16 [AS3477] 140.172.89.1 3.258 ms

17 [AS3477] 205.156.43.2 4.396 ms

Measurement taken from

IPinfo ProbeNet in Ashburn, US

On November 28th 2025

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS3477 at robtex.

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