ASN AS4466 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS4466?

AS4466 is listed under AT&T Enterprises, LLC.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS4466 AT&T Enterprises, LLC | IPGeolocation.io

ASN Lookup Tool

AT&T Enterprises, LLC semail.att.com

US 110 Routes

AS Data

AS4466

AS4466 – AT&T Enterprises, LLC

AS Number	4466
AS Name	EASYLINK2
Organization	AT&T Enterprises, LLC(ael-360)
Country	US
Website	semail.att.com
Number of IPv4 Routes	109
Number of IPv6 Routes	1
ASN type	BUSINESS
Registry	ARIN
Date Allocated	1995-03-05

ASN Intelligence API for production workflows

Use ASN data for AS4466 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
12.255.140.0/24	AS4466	AT&T Enterprises, LLC	CFWN Pool MP5L9S	256
204.127.176.0/24	AS4466	AT&T Enterprises, LLC	AT&T Consumer	256
204.127.146.0/24	AS4466	AT&T Enterprises, LLC	AT&T Consumer	256
12.255.85.0/24	AS4466	AT&T Enterprises, LLC	CFWN Pool MP5L6S	256
204.127.188.0/24	AS4466	AT&T Enterprises, LLC	AT&T Consumer	256
12.255.94.0/24	AS4466	AT&T Enterprises, LLC	CFWN Pool MP5L6S	256
204.127.143.0/24	AS4466	AT&T Enterprises, LLC	AT&T Consumer	256
204.127.192.0/24	AS4466	AT&T Enterprises, LLC	WHDC Pool ATTCT RWCCA	256
204.127.179.0/24	AS4466	AT&T Enterprises, LLC	AT&T Consumer	256
204.127.134.0/24	AS4466	AT&T Enterprises, LLC	AT&T Consumer	256

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       4466
ASName:         EASYLINK2
ASHandle:       AS4466
RegDate:        1995-03-05
Updated:        2025-03-18    
Ref:            https://rdap.arin.net/registry/autnum/4466



OrgName:        AT&T Enterprises, LLC
OrgId:          AEL-360
Address:        208 S. Akard St.
City:           Dallas
StateProv:      TX
PostalCode:     75202
Country:        US
RegDate:        2024-11-22
Updated:        2025-10-29
Ref:            https://rdap.arin.net/registry/entity/AEL-360


OrgAbuseHandle: ABUSE7-ARIN
OrgAbuseName:   abuse
OrgAbusePhone:  +1-919-319-8167 
OrgAbuseEmail:  abuse@att.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE7-ARIN

OrgTechHandle: ICC-ARIN
OrgTechName:   IP Team
OrgTechPhone:  +1-888-876-2382 
OrgTechEmail:  rm-ipspecialist@att.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ICC-ARIN

OrgTechHandle: ZS44-ARIN
OrgTechName:   IPAdmin-ATT Internet Services
OrgTechPhone:  +1-888-510-5545 
OrgTechEmail:  ipadmin@semail.att.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ZS44-ARIN

OrgRoutingHandle: ROUTI59-ARIN
OrgRoutingName:   Routing POC
OrgRoutingPhone:  +1-999-999-9999 
OrgRoutingEmail:  DL-routing_poc@att.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/ROUTI59-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number	Description	Country
AS7018	AT&T Enterprises, LLC	US

Upstreams

AS Number	Description	Country
AS7018	AT&T Enterprises, LLC	US

Contacts

Email Contacts

DL-routing_poc@att.com ipadmin@semail.att.com rm-ipspecialist@att.com

Abuse Contacts

abuse@att.net