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: 2025-03-18
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: 2025-03-21
Ref: https://rdap.arin.net/registry/entity/AEL-360

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

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

OrgRoutingHandle: ROUTI59-ARIN
OrgRoutingName: Routing POC
OrgRoutingPhone: +1-999-999-9999
OrgRoutingEmail: routing@cbbtier3.att.net
OrgRoutingRef: https://rdap.arin.net/registry/entity/ROUTI59-ARIN

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

NetRange: 12.200.204.0 - 12.200.204.255
CIDR: 12.200.204.0/24
NetName: ERESEARC61-204
NetHandle: NET-12-200-204-0-1
Parent: ATT (NET-12-0-0-0-1)
NetType: Reassigned
OriginAS:
Organization: ERESEARCH TECHNOLOGY (ERESE-3)
RegDate: 2009-06-05
Updated: 2009-06-05
Ref: https://rdap.arin.net/registry/ip/12.200.204.0

OrgName: ERESEARCH TECHNOLOGY
OrgId: ERESE-3
Address: 1818 Market Street
Address: Suite 1000
City: Philadelphia
StateProv: PA
PostalCode: 19103-3638
Country: US
RegDate: 2008-04-11
Updated: 2011-10-27
Ref: https://rdap.arin.net/registry/entity/ERESE-3

OrgTechHandle: MMA172-ARIN
OrgTechName: Maia, Manny
OrgTechPhone: +1-908-704-8010
OrgTechEmail: mmaia@ert.com
OrgTechRef: https://rdap.arin.net/registry/entity/MMA172-ARIN

OrgAbuseHandle: MMA172-ARIN
OrgAbuseName: Maia, Manny
OrgAbusePhone: +1-908-704-8010
OrgAbuseEmail: mmaia@ert.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/MMA172-ARIN

DNSBL* - is a list of IP addresses published through the Internet Domain Name Service (DNS) either as a zone file that can be used by DNS server software, or as a live DNS zone that can be queried in real-time. DNSBLs are most often used to publish the addresses of computers or networks linked to spamming; most mail server software can be configured to reject or flag messages which have been sent from a site listed on one or more such lists.

WHOIS** - is a query/response protocol that is widely used for querying databases in order to determine the registrant or assignee of Internet resources, such as a domain name, an IP address block, or an autonomous system number. WHOIS lookups were traditionally performed with a command line interface application, and network administrators predominantly still use this method, but many simplified web-based tools exist. WHOIS services are typically communicated using the Transmission Control Protocol (TCP). Servers listen to requests on the well-known port number 43.

** Approximate Geographic Location - This is NOT the exact geographical location of the person/organization with the given IP address. However, this should still give you a good idea about the area/region where this person/orgranization is located.