Want to find out who owns an ASN number? Utilities, Whois, Select "User Defined" (type whois.arin.net in the field next to it ) or select IP Address (arin) for the country/method, and enter the ASN number where you would normally type the domain. Nice that you see all the netblocks assingned to that entity too! Of course a one of your better whois services offers ASN lookups as well but what the heck - its nice to have it right at your own desktop. AS3 = AS3 (AS3) Massachusetts Institute of Technology (AS3) MIT-GATEWAYS 3 AS3 PMA-ASERVER3-CAWP (NET-206-128-113-0-1) 22.214.171.124 - 126.96.36.199 AS3 SBCIS-101410-10167 (NET-64-165-151-0-1) 188.8.131.52 - 184.108.40.206 AS3 SBCIS-101911-135046 (NET-66-126-64-0-1) 220.127.116.11 - 18.104.22.168 AS3 BKFD14 PBI NET SBCIS-100823-163952 (NET-64-160-198-0-1) 22.214.171.124 - 126.96.36.199 AS3 TULSOK Dial Pool SBCIS56585 (NET-208-189-58-0-1) 188.8.131.52 - 184.108.40.206 # ARIN WHOIS database, last updated 2004-08-04 19:10 # Enter ? for additional hints on searching ARIN's WHOIS database. _________________________________________________________________ AS3561 = OrgName: Cable & Wireless USA OrgID: CWU Address: 9000 Regency Parkway, Suite 200 City: Cary StateProv: NC PostalCode: 27511 Country: US ASNumber: 3561 ASName: CWUSA ASHandle: AS3561 Comment: RegDate: 1998-10-07 Updated: 2001-02-27 TechHandle: IA3-ORG-ARIN TechName: Cable and Wireless US TechPhone: +1-800-977-4662 TechEmail: firstname.lastname@example.org # ARIN WHOIS database, last updated 2004-08-04 19:10 # Enter ? for additional hints on searching ARIN's WHOIS database.