66.21.42.0/24

AS32467 · SFA Holdings Inc.

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Summary

Country	United States
Domain	att.com
ASN	AS32467
Parent Range	66.20.0.0/15
Registry	ARIN
ID	BELLSNET-BLK8

WHOIS Details

NetHandle:      NET-66-20-0-0-1
OrgID:          AEL-360
Parent:         NET-66-0-0-0-0
NetName:        BELLSNET-BLK8
NetRange:       66.20.0.0 - 66.21.255.255
NetType:        allocation
RegDate:        2000-09-14
Updated:        2024-12-05
Source:         ARIN


OrgID:          AEL-360
OrgName:        AT&T Enterprises, LLC
CanAllocate:    
Street:         9380 STATION ST
City:           LONE TREE
State/Prov:     CO
Country:        US
PostalCode:     80124
RegDate:        2024-11-22
Updated:        2025-10-14
OrgAdminHandle: ZS44-ARIN
OrgTechHandle:  ICC-ARIN
OrgTechHandle:  ZS44-ARIN
OrgAbuseHandle: ABUSE7-ARIN
OrgRoutingHandle:   ROUTI59-ARIN
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:        2025-08-18
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:        2025-08-18
OfficePhone:    +1-888-510-5545
Mailbox:        ipadmin@att.com
Mailbox:        ipadmin@semail.att.com
Source:         ARIN


POCHandle:      ABUSE7-ARIN
IsRole:         Y
LastName:       abuse
FirstName:      
Street:         2701 W 15th ST
City:           Plano
State/Prov:     TX
Country:        US
PostalCode:     75075
RegDate:        2002-08-24
Updated:        2025-08-18
OfficePhone:    +1-919-319-8167
Mailbox:        abuse@att.net
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 66.21.42.0/24

Range	ASN	Company	Num of IPs
66.20.0.0/15	AS6389	AT&T Enterprises, LLC	131,072
66.20.0.0/15	AS2386	AT&T Enterprises, LLC	131,072
66.20.0.0/15	AS32467	AT&T Enterprises, LLC	131,072
66.20.0.0/15	AS63238	AT&T Enterprises, LLC	131,072
66.20.0.0/15	AS23199	AT&T Enterprises, LLC	131,072

Nearby Ranges

BGP prefixes that overlap with 66.21.0.0/16

Range	ASN	Company	Num of IPs
66.20.0.0/15	AS23199	AT&T Enterprises, LLC	131,072
66.20.0.0/15	AS2386	AT&T Enterprises, LLC	131,072
66.20.0.0/15	AS32467	AT&T Enterprises, LLC	131,072
66.20.0.0/15	AS63238	AT&T Enterprises, LLC	131,072
66.20.0.0/15	AS6389	AT&T Enterprises, LLC	131,072

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

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

IP Address	ASN	Details
66.21.42.2	AS32467 SFA Holdings Inc.	`1.16ms` from Secaucus, 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
172.70.174.72	AS13335 Cloudflare, Inc.	`0.31ms` from Ashburn, US
20.221.177.200	AS8075 Microsoft Corporation	`0.18ms` from Boydton, US
172.76.44.136	AS5650 Frontier Communications of America, Inc.	`18.82ms` from Chicago, US
20.88.7.8	AS8075 Microsoft Corporation	`0.31ms` from Chicago, US
34.58.143.248	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
84.145.134.120	AS3320 Deutsche Telekom AG	`9.50ms` from Frankfurt am Main, DE
157.18.2.216	AS17816 China Unicom IP network China169 Guangdong province	`5.51ms` from Guangzhou, CN
113.235.27.8	AS4837 CHINA UNICOM China169 Backbone	`11.25ms` from Liaoyang, CN
159.65.23.216	AS14061 DigitalOcean, LLC	`0.24ms` from London, GB
2.89.141.56	AS25019 Saudi Telecom Company JSC	`3.88ms` from Manama, BH
133.88.64.8	AS17534 NSK Co.,Ltd.	`8.37ms` from Osaka, JP
173.75.233.72	AS701 Verizon Business	`4.69ms` from Philadelphia, US
179.209.96.24	AS28573 Claro NXT Telecomunicacoes Ltda	`5.64ms` from Sao Paulo, BR
110.43.122.248	AS59019 Beijing Kingsoft Cloud Internet Technology Co., Ltd	`6.89ms` from Tianjin, CN
113.56.69.200	AS4837 CHINA UNICOM China169 Backbone	`5.66ms` from Wuhan, CN
20.72.79.152	AS8075 Microsoft Corporation	`0.16ms` from Boydton, US
173.222.62.56	AS16625 Akamai Technologies, Inc.	`0.21ms` from Dallas, US
173.188.172.120	AS7029 Windstream Communications LLC	`14.56ms` from Dallas, US
93.131.27.72	AS6805 Telefonica Germany GmbH & Co.OHG	`3.00ms` from Duesseldorf, DE
82.35.30.136	AS5089 Virgin Media Limited	`12.15ms` from London, GB
46.65.162.40	AS5607 Sky UK Limited	`4.96ms` from London, GB
207.233.37.216	AS2152 CENIC	`1.84ms` from Los Angeles, US
3.98.35.152	AS16509 Amazon.com, Inc.	`0.16ms` from Montreal, CA
114.179.116.24	AS4713 NTT Communications Corporation	`2.95ms` from Osaka, JP
78.201.69.40	AS12322 Free SAS	`1.07ms` from Paris, FR

Traceroute

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

traceroute -a -n -q1 -f2 66.21.42.2

traceroute to 66.21.42.2 (66.21.42.2): 64 hops max, 52 byte packets

2 [AS917] 170.39.226.10 0.092 ms

3 [AS969] 102.130.51.206 0.128 ms

4 [] 5.252.164.112 0.153 ms

5 [AS7578] 206.148.25.138 0.11 ms

6 [AS7578] 206.148.25.111 0.109 ms

7 [AS174] 38.32.103.97 0.625 ms

8 [AS174] 154.24.52.198 1.725 ms

9 [AS174] 38.32.100.103 0.804 ms

10 *

11 [AS32467] 66.21.42.2 1.191 ms

Measurement taken from

IPinfo ProbeNet in Secaucus, US

On October 17th 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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