166.107.72.0/21

AS12054 · Alameda County

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Summary

Country	United States
Domain	acgov.org
ASN	AS12054
Registry	ARIN
ID	ALAMEDA

WHOIS Details

NetHandle:      NET-166-107-0-0-1
OrgID:          ACDP
Parent:         NET-166-0-0-0-0
NetName:        ALAMEDA
NetRange:       166.107.0.0 - 166.107.255.255
NetType:        allocation
RegDate:        1993-12-03
Updated:        2021-12-14
TechHandle:     NETWO8351-ARIN
AbuseHandle:    NETWO8351-ARIN
NOCHandle:      NETWO8351-ARIN
Source:         ARIN


OrgID:          ACDP
OrgName:        Alameda County
CanAllocate:    
Street:         1221 Oak Street
Street:         RM 41, ITD Data Center
City:           Oakland
State/Prov:     CA
Country:        US
PostalCode:     94612
RegDate:        1993-12-03
Updated:        2019-11-13
OrgAdminHandle: NETWO8351-ARIN
OrgTechHandle:  NETWO8351-ARIN
OrgAbuseHandle: NETWO8351-ARIN
OrgNOCHandle:   NETWO8351-ARIN
Source:         ARIN


POCHandle:      NETWO8351-ARIN
IsRole:         Y
LastName:       Network Services
FirstName:      
Street:         1221 Oak Street
City:           Oakland
State/Prov:     CA
Country:        US
PostalCode:     94612
RegDate:        2017-11-01
Updated:        2024-07-23
OfficePhone:    +1-510-383-5000
Mailbox:        [email protected]
Mailbox:        [email protected]
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 166.107.0.0/16

No nearby ranges found.

Hosted domains

There are 35 domain names hosted across 5 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
166.107.72.47	acgov.org	27
166.107.72.22	calassessorsit-jpa.com	5
166.107.72.144	map1193.com	2
166.107.72.38	achhd.org	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.

Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
166.107.72.205	AS12054 Alameda County	`2.88ms` 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
41.65.128.197	AS36992 ETISALAT MISR	`10.35ms` from Cairo, EG
177.155.91.53	AS263586 E. M. Fernandes	`7.83ms` from Curitiba, BR
112.98.109.37	AS4134 CHINANET-BACKBONE	`15.12ms` from Dalian, CN
176.119.155.181	AS42473 Anexia Cloud Solutions GmbH	`0.60ms` from Frankfurt am Main, DE
103.171.34.53	AS932 XNNET LLC	`0.48ms` from Hong Kong, HK
62.99.51.149	AS12338 Euskaltel S.A.	`8.32ms` from Madrid, ES
188.10.104.69	AS3269 Telecom Italia S.p.A.	`4.26ms` from Milan, IT
218.93.2.213	AS4134 CHINANET-BACKBONE	`4.03ms` from Nanjing, CN
209.79.12.101	AS7018 AT&T Enterprises, LLC	`6.04ms` from New York City, US
125.203.11.37	AS4713 NTT DOCOMO BUSINESS,Inc.	`13.63ms` from Osaka, JP
122.23.199.37	AS4713 NTT DOCOMO BUSINESS,Inc.	`6.83ms` from Osaka, JP
78.193.106.229	AS12322 Free SAS	`1.95ms` from Paris, FR
159.196.141.165	AS4764 Aussie Broadband	`1.20ms` from Perth, AU
52.91.76.197	AS14618 Amazon.com, Inc.	`0.45ms` from Reston, US
192.254.222.213	AS46606 Unified Layer	`2.01ms` from Salt Lake City, US
201.124.46.5	AS8151 UNINET	`3.74ms` from Santiago de Queretaro, MX
73.33.153.37	AS7922 Comcast Cable Communications, LLC	`5.15ms` from Secaucus, US
108.138.60.5	AS16509 Amazon.com, Inc.	`0.32ms` from Ashburn, US
43.209.83.101	AS16509 Amazon.com, Inc.	`1.58ms` from Bangkok, TH
87.61.129.149	AS3292 TDC Holding A/S	`0.98ms` from Copenhagen, DK
34.171.26.5	AS396982 Google LLC	`0.13ms` from Council Bluffs, US
156.47.167.21	AS6300 Fidium	`0.54ms` from Dallas, US
38.177.96.5	AS398478 PEG TECH INC	`0.23ms` from Hong Kong, HK
38.85.210.133	AS8796 FASTNET DATA INC	`0.31ms` from Los Angeles, US
49.148.139.165	AS9299 Philippine Long Distance Telephone Company	`18.92ms` from Manila, PH

Traceroute

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

traceroute -a -n -q1 -f2 -m12 166.107.73.250

traceroute to 166.107.73.250 (166.107.73.250): 12 hops max, 52 byte packets

2 [] 156.146.32.232 0.345 ms

3 [AS7018] 12.247.252.249 1.32 ms

4 *

5 *

6 *

7 *

8 [AS7018] 206.121.7.22 47.666 ms

9 [AS12054] 166.107.69.138 48.863 ms

10 *

11 *

12 *

Measurement taken from

IPinfo ProbeNet in Chicago, US

On December 6th 2025

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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