#
# 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 1997-2025, American Registry for Internet Numbers, Ltd.
#
# start
NetRange: 12.0.0.0 - 12.255.255.255
CIDR: 12.0.0.0/8
NetName: ATT
NetHandle: NET-12-0-0-0-1
Parent: NET12 (NET-12-0-0-0-0)
NetType: Direct Allocation
OriginAS:
Organization: AT&T Enterprises, LLC (AEL-360)
RegDate: 1983-08-23
Updated: 2025-12-02
Comment: IP assignments within this IP Block range are STATIC, not dynamic.
Ref: https://rdap.arin.net/registry/ip/12.0.0.0
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
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
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
OrgAbuseHandle: ABUSE7-ARIN
OrgAbuseName: abuse
OrgAbusePhone: +1-919-319-8167
OrgAbuseEmail: abuse@att.net
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE7-ARIN
# end
# start
NetRange: 12.129.192.0 - 12.129.255.255
CIDR: 12.129.192.0/18
NetName: ATTENS-LAX1-1
NetHandle: NET-12-129-192-0-1
Parent: ATT (NET-12-0-0-0-1)
NetType: Reallocated
OriginAS:
Organization: CERFnet (CERF)
RegDate: 2002-01-30
Updated: 2009-01-20
Ref: https://rdap.arin.net/registry/ip/12.129.192.0
OrgName: CERFnet
OrgId: CERF
Address: 5738 Pacific Center Blvd
City: San Diego
StateProv: CA
PostalCode: 92121
Country: US
RegDate: 1989-04-18
Updated: 2024-11-25
Comment: Contact AT&T Abuse (abuse@att.net) for policy abuse issues.
Comment: All policy abuse issues sent to other POCs will be disregarded.
Ref: https://rdap.arin.net/registry/entity/CERF
OrgRoutingHandle: DRU40-ARIN
OrgRoutingName: Rueegg, Daniel
OrgRoutingPhone: +41 1 4957899
OrgRoutingEmail: daniel.rueegg@intl.att.com
OrgRoutingRef: https://rdap.arin.net/registry/entity/DRU40-ARIN
OrgTechHandle: KRAJN2-ARIN
OrgTechName: Krajnakova, Henrieta
OrgTechPhone: +00000000
OrgTechEmail: henrieta.krajnakova@intl.att.com
OrgTechRef: https://rdap.arin.net/registry/entity/KRAJN2-ARIN
OrgTechHandle: NETWO10-ARIN
OrgTechName: Network Provisioning
OrgTechPhone: +1-877-789-2877
OrgTechEmail: dr6348@att.com
OrgTechRef: https://rdap.arin.net/registry/entity/NETWO10-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
OrgNOCHandle: STRAN154-ARIN
OrgNOCName: Stranska, Jana
OrgNOCPhone: +421 233225331
OrgNOCEmail: jana.stranska1@intl.att.com
OrgNOCRef: https://rdap.arin.net/registry/entity/STRAN154-ARIN
OrgAbuseHandle: NETWO10-ARIN
OrgAbuseName: Network Provisioning
OrgAbusePhone: +1-877-789-2877
OrgAbuseEmail: dr6348@att.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/NETWO10-ARIN
OrgRoutingHandle: LEITM2-ARIN
OrgRoutingName: Leitmanova, Lucia
OrgRoutingPhone: +421 2 332 25571
OrgRoutingEmail: rm-ip_allocator@intl.att.com
OrgRoutingRef: https://rdap.arin.net/registry/entity/LEITM2-ARIN
OrgNOCHandle: LEITM2-ARIN
OrgNOCName: Leitmanova, Lucia
OrgNOCPhone: +421 2 332 25571
OrgNOCEmail: rm-ip_allocator@intl.att.com
OrgNOCRef: https://rdap.arin.net/registry/entity/LEITM2-ARIN
OrgTechHandle: STRAN154-ARIN
OrgTechName: Stranska, Jana
OrgTechPhone: +421 233225331
OrgTechEmail: jana.stranska1@intl.att.com
OrgTechRef: https://rdap.arin.net/registry/entity/STRAN154-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
OrgTechHandle: DRU40-ARIN
OrgTechName: Rueegg, Daniel
OrgTechPhone: +41 1 4957899
OrgTechEmail: daniel.rueegg@intl.att.com
OrgTechRef: https://rdap.arin.net/registry/entity/DRU40-ARIN
OrgNOCHandle: DRU40-ARIN
OrgNOCName: Rueegg, Daniel
OrgNOCPhone: +41 1 4957899
OrgNOCEmail: daniel.rueegg@intl.att.com
OrgNOCRef: https://rdap.arin.net/registry/entity/DRU40-ARIN
OrgNOCHandle: NAJMI1-ARIN
OrgNOCName: Najmikova, Ivana
OrgNOCPhone: +421 250210682
OrgNOCEmail: ivana.najmikova@intl.att.com
OrgNOCRef: https://rdap.arin.net/registry/entity/NAJMI1-ARIN
OrgTechHandle: NAJMI1-ARIN
OrgTechName: Najmikova, Ivana
OrgTechPhone: +421 250210682
OrgTechEmail: ivana.najmikova@intl.att.com
OrgTechRef: https://rdap.arin.net/registry/entity/NAJMI1-ARIN
RTechHandle: IAA17-ARIN
RTechName: IP Address Administration
RTechPhone: +1-732-420-2071
RTechEmail: addrmgt@qsun.att.com
RTechRef: https://rdap.arin.net/registry/entity/IAA17-ARIN
RAbuseHandle: ATTAB-ARIN
RAbuseName: ATT Abuse
RAbusePhone: +1-999-999-9999
RAbuseEmail: abuse@att.net
RAbuseRef: https://rdap.arin.net/registry/entity/ATTAB-ARIN
RNOCHandle: IPSWI-ARIN
RNOCName: IP SWIP
RNOCPhone: +1-888-613-6330
RNOCEmail: help@ip.att.net
RNOCRef: https://rdap.arin.net/registry/entity/IPSWI-ARIN
# end
# start
NetRange: 12.129.231.0 - 12.129.231.255
CIDR: 12.129.231.0/24
NetName: ATTENS-008836-002322
NetHandle: NET-12-129-231-0-1
Parent: ATTENS-LAX1-1 (NET-12-129-192-0-1)
NetType: Reassigned
OriginAS:
Customer: Service Zone Holdings, LLC (C00638740)
RegDate: 2003-08-01
Updated: 2003-08-01
Comment: CERF-HM-ARIN
Ref: https://rdap.arin.net/registry/ip/12.129.231.0
CustName: Service Zone Holdings, LLC
Address: 28163 US Highway 19 N
City: Clearwater
StateProv: FL
PostalCode: 33761
Country: US
RegDate: 2003-08-01
Updated: 2011-03-19
Ref: https://rdap.arin.net/registry/entity/C00638740
OrgRoutingHandle: DRU40-ARIN
OrgRoutingName: Rueegg, Daniel
OrgRoutingPhone: +41 1 4957899
OrgRoutingEmail: daniel.rueegg@intl.att.com
OrgRoutingRef: https://rdap.arin.net/registry/entity/DRU40-ARIN
OrgTechHandle: KRAJN2-ARIN
OrgTechName: Krajnakova, Henrieta
OrgTechPhone: +00000000
OrgTechEmail: henrieta.krajnakova@intl.att.com
OrgTechRef: https://rdap.arin.net/registry/entity/KRAJN2-ARIN
OrgTechHandle: NETWO10-ARIN
OrgTechName: Network Provisioning
OrgTechPhone: +1-877-789-2877
OrgTechEmail: dr6348@att.com
OrgTechRef: https://rdap.arin.net/registry/entity/NETWO10-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
OrgNOCHandle: STRAN154-ARIN
OrgNOCName: Stranska, Jana
OrgNOCPhone: +421 233225331
OrgNOCEmail: jana.stranska1@intl.att.com
OrgNOCRef: https://rdap.arin.net/registry/entity/STRAN154-ARIN
OrgAbuseHandle: NETWO10-ARIN
OrgAbuseName: Network Provisioning
OrgAbusePhone: +1-877-789-2877
OrgAbuseEmail: dr6348@att.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/NETWO10-ARIN
OrgRoutingHandle: LEITM2-ARIN
OrgRoutingName: Leitmanova, Lucia
OrgRoutingPhone: +421 2 332 25571
OrgRoutingEmail: rm-ip_allocator@intl.att.com
OrgRoutingRef: https://rdap.arin.net/registry/entity/LEITM2-ARIN
OrgNOCHandle: LEITM2-ARIN
OrgNOCName: Leitmanova, Lucia
OrgNOCPhone: +421 2 332 25571
OrgNOCEmail: rm-ip_allocator@intl.att.com
OrgNOCRef: https://rdap.arin.net/registry/entity/LEITM2-ARIN
OrgTechHandle: STRAN154-ARIN
OrgTechName: Stranska, Jana
OrgTechPhone: +421 233225331
OrgTechEmail: jana.stranska1@intl.att.com
OrgTechRef: https://rdap.arin.net/registry/entity/STRAN154-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
OrgTechHandle: DRU40-ARIN
OrgTechName: Rueegg, Daniel
OrgTechPhone: +41 1 4957899
OrgTechEmail: daniel.rueegg@intl.att.com
OrgTechRef: https://rdap.arin.net/registry/entity/DRU40-ARIN
OrgNOCHandle: DRU40-ARIN
OrgNOCName: Rueegg, Daniel
OrgNOCPhone: +41 1 4957899
OrgNOCEmail: daniel.rueegg@intl.att.com
OrgNOCRef: https://rdap.arin.net/registry/entity/DRU40-ARIN
OrgNOCHandle: NAJMI1-ARIN
OrgNOCName: Najmikova, Ivana
OrgNOCPhone: +421 250210682
OrgNOCEmail: ivana.najmikova@intl.att.com
OrgNOCRef: https://rdap.arin.net/registry/entity/NAJMI1-ARIN
OrgTechHandle: NAJMI1-ARIN
OrgTechName: Najmikova, Ivana
OrgTechPhone: +421 250210682
OrgTechEmail: ivana.najmikova@intl.att.com
OrgTechRef: https://rdap.arin.net/registry/entity/NAJMI1-ARIN
RTechHandle: IAA17-ARIN
RTechName: IP Address Administration
RTechPhone: +1-732-420-2071
RTechEmail: addrmgt@qsun.att.com
RTechRef: https://rdap.arin.net/registry/entity/IAA17-ARIN
RAbuseHandle: ATTAB-ARIN
RAbuseName: ATT Abuse
RAbusePhone: +1-999-999-9999
RAbuseEmail: abuse@att.net
RAbuseRef: https://rdap.arin.net/registry/entity/ATTAB-ARIN
RNOCHandle: IPSWI-ARIN
RNOCName: IP SWIP
RNOCPhone: +1-888-613-6330
RNOCEmail: help@ip.att.net
RNOCRef: https://rdap.arin.net/registry/entity/IPSWI-ARIN
# end
#
# 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 1997-2025, American Registry for Internet Numbers, Ltd.
#
Map neighboring IP addresses and identify potential subnet associations.