1. All IP Ranges
  2. 166.0.0.0/8
  3. 166.123.0.0/16
  4. AS13506  | 166.123.0.0/16

166.123.0.0/16

AS13506  ·  United States Department of the Treasury

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Summary

Country United States
Domain treasury.gov
ASN AS13506
Registry ARIN
ID US-DEPARTMENT-OF-THE-TREASURY

WHOIS Details

NetHandle:      NET-166-123-0-0-1
OrgID:          UDT-6-Z
Parent:         NET-166-0-0-0-0
NetName:        US-DEPARTMENT-OF-THE-TREASURY
NetRange:       166.123.0.0 - 166.123.255.255
NetType:        allocation
RegDate:        1993-12-29
Updated:        2024-05-31
Source:         ARIN


OrgID:          UDT-6-Z
OrgName:        United States Department of the Treasury
CanAllocate:    
Street:         OCIO
Street:         1750 Pennsylvania Ave., NW
City:           Washington
State/Prov:     DC
Country:        US
PostalCode:     20006
RegDate:        2024-05-01
Updated:        2025-03-27
OrgAdminHandle: METZI13-ARIN
OrgTechHandle:  DLS46-ARIN
OrgTechHandle:  METZI13-ARIN
OrgTechHandle:  TIC5-ARIN
OrgAbuseHandle: USTRE-ARIN
OrgNOCHandle:   USTRE-ARIN
OrgRoutingHandle:   TIC5-ARIN
Source:         ARIN


POCHandle:      DLS46-ARIN
IsRole:         N
LastName:       Smicker
FirstName:      Daniel
Street:         200 Third St
City:           Parkersburg
State/Prov:     WV
Country:        US
PostalCode:     26106
RegDate:        2012-09-05
Updated:        2025-08-22
OfficePhone:    +1-304-480-7779
Mailbox:        ecb-hosting@fiscal.treasury.gov
Source:         ARIN


POCHandle:      TIC5-ARIN
IsRole:         Y
LastName:       TIC
FirstName:      
Street:         200 3rd Street
City:           Parkersburg
State/Prov:     WV
Country:        US
PostalCode:     26101
RegDate:        2024-03-07
Updated:        2025-03-13
OfficePhone:    +1-304-480-6845
Mailbox:        ecb-tic@fiscal.treasury.gov
Source:         ARIN


POCHandle:      USTRE-ARIN
IsRole:         Y
LastName:       US-TREASURY-SOC
FirstName:      
Street:         1500 Pennsylvania Avenue
City:           Washington
State/Prov:     DC
Country:        US
PostalCode:     20220
RegDate:        2025-03-26
Updated:        2025-03-26
OfficePhone:    +1-202-927-9777
Mailbox:        soc@soc.treasury.gov
Source:         ARIN


POCHandle:      METZI13-ARIN
IsRole:         N
LastName:       Metzinger
FirstName:      Timothy
Street:         1750 Pennsylvania Ave. NW
Street:         OCIO/IO
City:           Washington
State/Prov:     DC
Country:        US
PostalCode:     20006
RegDate:        2025-03-27
Updated:        2025-03-27
OfficePhone:    +1-202-286-9654
Mailbox:        timothy.metzinger@treasury.gov
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 166.0.0.0/8

Range ASN Company Num of IPs
166.20.0.0/16 AS243 L3Harris Technologies, Inc. 65,536
166.69.0.0/16 AS19773 Motorola MNIC 65,536
166.93.0.0/16 AS26914 Synoptek, LLC 65,536
166.100.0.0/16 AS2687 AT&T Japan K.K. 65,536
166.80.0.0/16 AS16509 Amazon.com, Inc. 65,536
166.74.0.0/16 AS16509 Amazon.com, Inc. 65,536
166.90.0.0/16 AS3356 Level 3 Parent, LLC 65,536
166.89.0.0/16 AS13918 City of Tucson 65,536
166.56.0.0/16 AS3371 Verizon Business 65,536
166.56.0.0/16 AS3372 Verizon Business 65,536
166.84.0.0/16 AS2033 Panix 65,536
166.70.0.0/16 AS6315 XMission, L.C. 65,536
166.211.0.0/16 AS22394 Verizon Business 65,536
166.99.0.0/16 AS11719 Eaton Corporation 65,536
166.92.0.0/16 AS16509 Amazon.com, Inc. 65,536
166.104.0.0/16 AS9321 Hanyang University 65,536
166.82.0.0/16 AS7029 Windstream Communications LLC 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
166.58.0.0/16 AS3377 Verizon Business 65,536
166.91.0.0/16 AS33084 District of Columbia Public Schools 65,536
166.91.0.0/16 AS14072 District of Columbia Public Schools 65,536
166.211.0.0/16 AS6167 Verizon Business 65,536
166.102.0.0/16 AS7029 Windstream Communications LLC 65,536
166.122.0.0/16 AS6360 University of Hawaii 65,536
166.238.0.0/16 AS26611 COMUNICACIÓN CELULAR S.A. COMCEL S.A. 65,536
166.72.0.0/16 AS7018 AT&T Enterprises, LLC 65,536
166.117.0.0/16 AS16509 Amazon.com, Inc. 65,536
166.87.0.0/16 AS5080 Saudi Arabian Oil Company 65,536
166.111.0.0/16 AS4538 Tsinghua University 65,536
166.94.0.0/16 AS3926 Fairfax County Government 65,536
166.49.128.0/17 AS5400 communications networking services Private Unlimited Company 32,768
166.48.0.0/17 AS396338 Altima Telecom 32,768
166.62.128.0/17 AS5769 Videotron Ltee 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
166.114.64.0/18 AS6568 EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA 16,384
166.113.64.0/18 AS53449 OEC Fiber 16,384
166.108.128.0/18 AS35077 Netwo SAS 16,384
166.114.32.0/19 AS6568 EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA 8,192
166.113.32.0/19 AS13370 Ziply Fiber 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
166.114.16.0/20 AS6568 EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA 4,096

Hosted domains

There are 5 domain names hosted across 4 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
166.123.8.156 usaspending.gov 2
166.123.10.147 its.gov 1
166.123.231.85 mytreasury.gov 1
166.123.230.239 asap.gov 1

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.
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Read more

Pingable IPs

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

IP Address ASN Details
166.123.9.172 AS13506 United States Department of the Treasury 1.53ms from San Jose, US
166.123.116.8 AS13506 United States Department of the Treasury 32.58ms from San Jose, US
166.123.211.129 AS13506 United States Department of the Treasury 57.49ms from San Jose, US
166.123.204.10 AS13506 United States Department of the Treasury 1.33ms from San Jose, US
166.123.156.5 AS13506 United States Department of the Treasury 40.09ms from San Jose, 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
94.225.214.112 AS6848 Telenet BV 5.30ms from Brussels, BE
89.120.126.0 AS9050 Orange Romania S.A. 0.43ms from Bucharest, RO
139.211.30.0 AS4837 CHINA UNICOM China169 Backbone 2.82ms from Changchun, CN
74.33.86.112 AS5650 Frontier Communications of America, Inc. 9.86ms from Chicago, US
23.117.137.48 AS7018 AT&T Enterprises, LLC 10.39ms from Dallas, US
64.236.119.16 AS8075 Microsoft Corporation 0.32ms from Des Moines, US
35.178.159.128 AS16509 Amazon.com, Inc. 0.15ms from London, GB
5.65.245.160 AS5607 Sky UK Limited 1.83ms from London, GB
43.205.209.128 AS16509 Amazon.com, Inc. 0.13ms from Mumbai, IN
150.9.64.192 AS4685 Asahi Net 10.21ms from Osaka, JP
18.228.104.80 AS16509 Amazon.com, Inc. 0.14ms from Osasco, BR
149.115.105.96 AS174 Cogent Communications, LLC 0.15ms from Seattle, US
1.98.230.176 AS4766 Korea Telecom 2.33ms from Seoul, KR
91.53.73.48 AS3320 Deutsche Telekom AG 2.75ms from Berlin, DE
44.244.197.80 AS16509 Amazon.com, Inc. 0.20ms from Boardman, US
69.211.50.0 AS7018 AT&T Enterprises, LLC 1.05ms from Chicago, US
3.131.202.224 AS16509 Amazon.com, Inc. 0.13ms from Columbus, US
3.133.159.160 AS16509 Amazon.com, Inc. 0.11ms from Columbus, US
109.57.26.48 AS44034 Hi3G Access AB 5.45ms from Copenhagen, DK
75.87.140.128 AS11427 Charter Communications Inc 15.31ms from Dallas, US
93.212.15.240 AS3320 Deutsche Telekom AG 4.92ms from Frankfurt am Main, DE
190.233.69.208 AS6147 Telefonica del Peru S.A.A. 11.94ms from Lima, PE
76.178.97.144 AS20001 Charter Communications Inc 4.89ms from Los Angeles, US
223.177.38.32 AS24560 Bharti Airtel Ltd., Telemedia Services 15.16ms from Mumbai, IN
148.74.121.192 AS6128 Cablevision Systems Corp. 7.59ms from New York City, US

Traceroute

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

$
traceroute -a -n -q1 -m10 166.123.1.180
traceroute to 166.123.1.180 (166.123.1.180): 10 hops max, 52 byte packets
4 *
6 [AS2914] 128.241.8.213 0.364 ms
7 [AS14244] 199.19.71.66 0.843 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in San Jose, US
On

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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