12.139.152.0/24

AS20138 · Carson Tahoe Health System

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Summary

Country	United States
Domain	att.com
ASN	AS20138
Parent Range	12.128.0.0/9
Registry	ARIN
ID	ATTWORLD26

WHOIS Details

NetHandle:      NET-12-139-0-0-1
OrgID:          ATTW
Parent:         NET-12-0-0-0-1
NetName:        ATTWORLD26
NetRange:       12.139.0.0 - 12.139.255.255
NetType:        reallocation
OriginAS:       7018
Comment:        This block is static, not dynamic.
RegDate:        2010-05-21
Updated:        2010-05-21
Source:         ARIN


OrgID:          ATTW
OrgName:        AT&T Services, Inc.
CanAllocate:    
Street:         200 S. Laurel AVE.
City:           MIDDLETOWN
State/Prov:     NJ
Country:        US
PostalCode:     07748
Comment:        Contact AT&T Abuse ( abuse@att.net ) for policy abuse issues.
Comment:        All policy abuse issues sent to other POCs will be disregarded.
RegDate:        1970-01-01
Updated:        2024-11-25
OrgAdminHandle: ZS44-ARIN
OrgTechHandle:  ICC-ARIN
OrgTechHandle:  IPSWI-ARIN
OrgAbuseHandle: ATTAB-ARIN
OrgRoutingHandle:   ROUTI59-ARIN
Source:         ARIN


POCHandle:      ATTAB-ARIN
IsRole:         Y
LastName:       ATT Abuse
FirstName:      
Street:         4625 Creekstone Drive
City:           Durham
State/Prov:     NC
Country:        US
PostalCode:     27703
RegDate:        2002-09-24
Updated:        2025-07-03
OfficePhone:    +1-999-999-9999
Mailbox:        abuse@att.net
Source:         ARIN


POCHandle:      IPSWI-ARIN
IsRole:         Y
LastName:       IP SWIP
FirstName:      
Street:         One Corporate Place South
City:           Piscataway
State/Prov:     NJ
Country:        US
PostalCode:     08854
RegDate:        2002-09-24
Updated:        2025-07-03
OfficePhone:    +1-888-613-6330
Mailbox:        help@ip.att.net
Mailbox:        swipid@icorefep1.ims.att.com
Mailbox:        swipid@icorefep2.noc.att.com
Mailbox:        swipid@icorefep3.ims.att.com
Source:         ARIN


POCHandle:      ICC-ARIN
IsRole:         Y
LastName:       IP Team
FirstName:      
Street:         200 S. Laurel AVE
City:           MIDDLETOWN
State/Prov:     NJ
Country:        US
PostalCode:     07748
RegDate:        2002-09-24
Updated:        2025-07-03
OfficePhone:    +1-888-876-2382
Mailbox:        rm-ipspecialist@att.com
Source:         ARIN


POCHandle:      ZS44-ARIN
IsRole:         Y
LastName:       IPAdmin-ATT Internet Services
FirstName:      
Street:         7277 164th Ave NE
Street:         Attn: IP Management
City:           Redmond
State/Prov:     WA
Country:        US
PostalCode:     98052
RegDate:        2000-05-17
Updated:        2025-07-03
OfficePhone:    +1-888-510-5545
Mailbox:        ipadmin@att.com
Mailbox:        ipadmin@semail.att.com
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 12.139.152.0/24

Range	ASN	Company	Num of IPs
12.128.0.0/9	AS7018	AT&T Enterprises, LLC	8,388,608
12.0.0.0/8	AS7018	AT&T Enterprises, LLC	16,777,216

Nearby Ranges

BGP prefixes that overlap with 12.139.0.0/16

Range	ASN	Company	Num of IPs
12.0.0.0/8	AS7018	AT&T Enterprises, LLC	16,777,216
12.128.0.0/9	AS7018	AT&T Enterprises, LLC	8,388,608
12.139.121.0/24	AS25823	CHURCH OF SCIENTOLOGY FLAG S	256
12.139.109.0/24	AS53432	AT&T Services, Inc.	256
12.139.74.0/24	AS17365	COUNTY OF MONTEREY	256
12.139.4.0/24	AS26028	PANDUIT CORPATTN ACCOUNTS PAY	256

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

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Pingable IPs

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

IP Address	ASN	Details
12.139.152.2	AS20138 Carson Tahoe Health System	8.12ms from Redding, 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
24.254.22.72	AS22773 Cox Communications Inc.	8.01ms from Ashburn, US
197.45.212.88	AS8452 TE-AS	5.09ms from Cairo, EG
124.57.174.152	AS17858 LG POWERCOMM	1.99ms from Seoul, KR
59.126.163.24	AS3462 Data Communication Business Group	1.97ms from Taichung, TW
120.92.38.72	AS59019 Beijing Kingsoft Cloud Internet Technology Co., Ltd	3.45ms from Beijing, CN
134.122.127.184	AS14061 DigitalOcean, LLC	0.24ms from New York City, US
2.87.74.24	AS6799 Ote SA (Hellenic Telecommunications Organisation)	1.66ms from Athens, GR
18.254.230.120	AS8987 Amazon Data Services Ireland Ltd	0.85ms from Columbus, US
88.12.170.72	AS3352 TELEFONICA DE ESPANA S.A.U.	1.15ms from Madrid, ES
114.207.103.88	AS9318 SK Broadband Co Ltd	1.41ms from Seoul, KR
70.76.231.40	AS6327 Shaw Communications Inc.	11.81ms from Toronto, CA
44.241.169.88	AS16509 Amazon.com, Inc.	0.19ms from Boardman, US
168.44.192.8	AS1761 General Services Commission	6.06ms from Dallas, US
47.83.181.56	AS45102 Alibaba (US) Technology Co., Ltd.	0.63ms from Hong Kong, HK
82.4.82.184	AS5089 Virgin Media Limited	5.75ms from London, GB
192.219.67.24	AS376 Reseau d'Informations Scientifiques du Quebec (RISQ Inc.)	4.06ms from Montreal, CA
41.208.30.8	AS16637 MTN SA	16.20ms from Johannesburg, ZA
84.65.230.168	AS5378 Vodafone Limited	5.49ms from London, GB
187.155.224.216	AS8151 UNINET	12.69ms from Miami, US
100.8.231.8	AS701 Verizon Business	2.41ms from New York City, US
101.142.39.120	AS17511 OPTAGE Inc.	3.02ms from Osaka, JP
194.182.29.152	AS42525 GlobalConnect A/S	0.31ms from Copenhagen, DK
34.9.38.136	AS396982 Google LLC	0.12ms from Council Bluffs, US
36.212.84.120	AS9808 China Mobile Communications Group Co., Ltd.	0.60ms from Hohhot, CN
34.101.41.56	AS396982 Google LLC	0.10ms from Jakarta, ID

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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