166.4.0.0/15

AS4155 · USDA

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Summary

Country	United States
Domain	usda.gov
ASN	AS4155
Registry	ARIN
ID	NETBLK-USFS

WHOIS Details

NetHandle:      NET-166-2-0-0-1
OrgID:          USDA-3-Z
Parent:         NET-166-0-0-0-0
NetName:        NETBLK-USFS
NetRange:       166.2.0.0 - 166.7.255.255
NetType:        allocation
RegDate:        1993-11-03
Updated:        2024-04-25
Source:         ARIN


OrgID:          USDA-3-Z
OrgName:        USDA
CanAllocate:    
Street:         Suite 133, Building A
Street:         2150 Centre Ave
City:           Fort Collins
State/Prov:     CO
Country:        US
PostalCode:     80526
RegDate:        2024-04-10
Updated:        2024-04-10
OrgAdminHandle: ZU20-ARIN
OrgTechHandle:  ZU20-ARIN
OrgAbuseHandle: SECUR27-ARIN
OrgAbuseHandle: ZU20-ARIN
Source:         ARIN


POCHandle:      ZU20-ARIN
IsRole:         Y
LastName:       USDA - Office of the ChiefInformation Officer
FirstName:      
Street:         2150 Centre Ave. Building A Suite 133
City:           Fort Collins
State/Prov:     CO
Country:        US
PostalCode:     80526
RegDate:        2000-06-16
Updated:        2025-06-27
OfficePhone:    +1-866-873-2926
Mailbox:        duty.officer@usda.gov
Source:         ARIN


POCHandle:      SECUR27-ARIN
IsRole:         Y
LastName:       Security Abuse
FirstName:      
Street:         2150 Centre Ave. Building A
City:           Fort Collins
State/Prov:     CO
Country:        US
PostalCode:     80526
RegDate:        2008-10-08
Updated:        2018-11-29
OfficePhone:    +1-866-873-2926
Mailbox:        abuse@usda.gov
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 166.0.0.0/8

Range	ASN	Company	Num of IPs
166.69.0.0/16	AS19773	Motorola MNIC	65,536
166.87.0.0/16	AS5080	Saudi Arabian Oil Company	65,536
166.74.0.0/16	AS16509	Amazon.com, Inc.	65,536
166.100.0.0/16	AS2687	AT&T Japan K.K.	65,536
166.117.0.0/16	AS16509	Amazon.com, Inc.	65,536
166.211.0.0/16	AS22394	Verizon Business	65,536
166.93.0.0/16	AS26914	Synoptek, LLC	65,536
166.20.0.0/16	AS243	L3Harris Technologies, Inc.	65,536
166.90.0.0/16	AS3356	Level 3 Parent, LLC	65,536
166.56.0.0/16	AS3372	Verizon Business	65,536
166.84.0.0/16	AS2033	Panix	65,536
166.80.0.0/16	AS16509	Amazon.com, Inc.	65,536
166.99.0.0/16	AS11719	Eaton Corporation	65,536
166.123.0.0/16	AS13506	United States Department of the Treasury	65,536
166.91.0.0/16	AS33084	District of Columbia Public Schools	65,536
166.92.0.0/16	AS16509	Amazon.com, Inc.	65,536
166.89.0.0/16	AS13918	City of Tucson	65,536
166.211.0.0/16	AS6167	Verizon Business	65,536
166.58.0.0/16	AS3372	Verizon Business	65,536
166.90.0.0/16	AS3257	Level 3 Parent, LLC	65,536
166.19.0.0/16	AS33425	CoreWeave, Inc	65,536
166.58.0.0/16	AS3371	Verizon Business	65,536
166.238.0.0/16	AS26611	COMUNICACIÓN CELULAR S.A. COMCEL S.A.	65,536
166.58.0.0/16	AS3377	Verizon Business	65,536
166.91.0.0/16	AS14072	District of Columbia Public Schools	65,536
166.56.0.0/16	AS3371	Verizon Business	65,536
166.94.0.0/16	AS3926	Fairfax County Government	65,536
166.72.0.0/16	AS7018	AT&T Enterprises, LLC	65,536
166.111.0.0/16	AS4538	Tsinghua University	65,536
166.82.0.0/16	AS7029	Windstream Communications LLC	65,536
166.102.0.0/16	AS7029	Windstream Communications LLC	65,536
166.104.0.0/16	AS9321	Hanyang University	65,536
166.70.0.0/16	AS6315	XMission, L.C.	65,536
166.122.0.0/16	AS6360	University of Hawaii	65,536
166.49.128.0/17	AS5400	communications networking services Private Unlimited Company	32,768
166.62.128.0/17	AS5769	Videotron Ltee	32,768
166.48.0.0/17	AS396338	Altima Telecom	32,768
166.114.128.0/17	AS6568	EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA	32,768
166.49.0.0/17	AS3561	CenturyLink Communications, LLC	32,768
166.113.64.0/18	AS53449	OEC Fiber	16,384
166.108.128.0/18	AS35077	Netwo SAS	16,384
166.114.64.0/18	AS6568	EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA	16,384
166.113.32.0/19	AS13370	Ziply Fiber	8,192
166.114.32.0/19	AS6568	EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA	8,192
166.63.128.0/19	AS3561	CenturyLink Communications, LLC	8,192
166.63.192.0/19	AS1273	Vodafone Americas	8,192
166.113.0.0/19	AS19870	Cherry Creek School District #5	8,192
166.108.0.0/19	AS16509	Amazon.com, Inc.	8,192
166.63.160.0/19	AS1273	Vodafone Americas	8,192
166.93.0.0/20	AS26914	Synoptek Pittsford DC	4,096

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
31.160.197.127	AS1136 KPN B.V.	`0.43ms` from Amsterdam, NL
54.214.178.79	AS16509 Amazon.com, Inc.	`0.20ms` from Boardman, US
35.82.169.239	AS16509 Amazon.com, Inc.	`0.15ms` from Boardman, US
104.91.61.159	AS16625 Akamai Technologies, Inc.	`0.56ms` from Boston, US
75.35.136.239	AS7018 AT&T Enterprises, LLC	`3.25ms` from Dallas, US
99.136.88.207	AS7018 AT&T Enterprises, LLC	`2.35ms` from Dallas, US
27.58.15.255	AS24560 Bharti Airtel Ltd., Telemedia Services	`5.44ms` from Delhi, IN
185.51.166.223	AS132839 POWER LINE DATACENTER	`0.95ms` from Hong Kong, HK
108.82.221.159	AS7018 AT&T Enterprises, LLC	`3.85ms` from Houston, US
182.70.74.239	AS24560 Bharti Airtel Ltd., Telemedia Services	`1.95ms` from Lohogaon, IN
86.180.206.223	AS2856 British Telecommunications PLC	`6.03ms` from London, GB
77.238.26.159	AS20746 Telecom Italia S.p.A.	`6.06ms` from Milan, IT
82.54.153.191	AS3269 Telecom Italia S.p.A.	`1.54ms` from Milan, IT
39.77.9.15	AS4837 CHINA UNICOM China169 Backbone	`1.18ms` from Qingdao, CN
18.209.51.47	AS14618 Amazon.com, Inc.	`0.49ms` from Reston, US
112.187.103.223	AS4766 Korea Telecom	`5.53ms` from Seoul, KR
101.230.148.31	AS4812 China Telecom (Group)	`2.43ms` from Shanghai, CN
43.209.88.175	AS16509 Amazon.com, Inc.	`1.57ms` from Bangkok, TH
8.141.84.207	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.79ms` from Beijing, CN
167.173.28.47	AS36578 Hearst-Argyle Television, Inc.	`7.92ms` from Chicago, US
34.67.92.207	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
43.100.102.15	AS45102 Alibaba (US) Technology Co., Ltd.	`0.66ms` from Hong Kong, HK
149.129.197.255	AS45102 Alibaba (US) Technology Co., Ltd.	`0.63ms` from Jakarta, ID
6.4.174.31	AS668 United States Department of Defense (DoD)	`1.77ms` from Los Angeles, US
110.142.117.191	AS1221 Telstra Limited	`11.41ms` from Melbourne, AU

Traceroute

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

traceroute -a -n -q1 -f3 -m11 166.4.10.88

traceroute to 166.4.10.88 (166.4.10.88): 11 hops max, 52 byte packets

3 [AS174] 130.117.1.150 110.342 ms

4 [AS174] 154.54.74.165 11.163 ms

5 [AS174] 154.54.57.162 11.335 ms

6 *

7 *

8 [AS3356] 4.68.110.154 102.687 ms

9 *

10 *

11 *

Measurement taken from

IPinfo ProbeNet in Derby, GB

On December 14th 2025

What are IP address ranges?

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