This AS is not currently used to announce prefixes in the global routing table, nor is it used as a visible transit AS.
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS17227 27 More Specifics 27 Total Advertisements ATT-CERFNET-BLOCK, US
12.66.62.0/24 12.0.0.0/8
12.66.85.0/24 12.0.0.0/8
12.66.86.0/23 12.0.0.0/8
12.66.88.0/21 12.0.0.0/8
12.66.96.0/21 12.0.0.0/8
12.66.104.0/23 12.0.0.0/8
12.67.5.0/24 12.0.0.0/8
12.130.232.0/21 12.0.0.0/8
32.102.50.0/24 32.0.0.0/9
32.224.142.0/24 32.224.0.0/13
32.228.176.0/24 32.224.0.0/13
32.228.177.0/24 32.224.0.0/13
32.228.178.0/23 32.224.0.0/13
32.228.180.0/24 32.224.0.0/13
32.228.184.0/23 32.224.0.0/13
32.228.186.0/24 32.224.0.0/13
63.241.192.0/18 63.240.0.0/15
63.241.244.0/24 63.240.0.0/15
134.24.161.0/24 134.24.0.0/16
134.24.220.0/22 134.24.0.0/16
193.242.18.0/24 193.242.16.0/20
199.107.120.0/21 199.106.0.0/15
206.16.16.0/20 206.16.0.0/14
206.16.56.0/21 206.16.0.0/14
206.16.64.0/23 206.16.0.0/14
206.18.176.0/20 206.16.0.0/14
209.251.236.0/24 209.251.236.0/23
Prefixes added and withdrawn by this origin AS in the past 7 days.
+ 63.241.244.0/24 Announced
+ 193.242.18.0/24 Announced
+ 209.251.236.0/24 Announced
whois: 402609
IANA has recorded AS17227 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS17227\n
#
# 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/
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# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#
ASNumber: 17224 - 17233
ASName: ATT-CERFNET-BLOCK
ASHandle: AS17224
RegDate: 2000-08-09
Updated: 2025-03-19
Ref: https://rdap.arin.net/registry/autnum/17224
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: 2026-06-05
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
OrgRoutingHandle: ROUTI59-ARIN
OrgRoutingName: Routing POC
OrgRoutingPhone: +1-999-999-9999
OrgRoutingEmail: routing_poc@att.com
OrgRoutingRef: https://rdap.arin.net/registry/entity/ROUTI59-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
#
# 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.
#