Hey hey,

It's not a list, but I tend to use http://ws.arin.net/cgi-bin/whois.pl when I want to look up an ip address

eg:

Search results for: 63.146.109.212

Qwest Communications NET-QWEST-BLKS-2 (NET-63-144-0-0-1)
63.144.0.0 - 63.151.255.255
Jupitermedia Corp. QWEST-EWR-JUPIT3 (NET-63-146-109-128-1)
63.146.109.128 - 63.146.109.255
Qwest Cybercenters QWEST-63-146-96 (NET-63-146-96-0-1)
63.146.96.0 - 63.146.127.255
You can further break that down by selecting the links they provide and get


OrgName: Jupitermedia Corp.
OrgID: JUPIT-2
Address: 23 Old Kings Highway S
City: Darien
StateProv: CT
PostalCode: 06820
Country: US

NetRange: 63.146.109.128 - 63.146.109.255
CIDR: 63.146.109.128/25
NetName: QWEST-EWR-JUPIT3
NetHandle: NET-63-146-109-128-1
Parent: NET-63-146-96-0-1
NetType: Reassigned
Comment:
RegDate: 2003-06-11
Updated: 2003-06-11

OrgAbuseHandle: JUPIT-ARIN
OrgAbuseName: Jupitermedia Abuse
OrgAbusePhone: +1-203-662-2800
OrgAbuseEmail: [email protected]

OrgTechHandle: PH535-ARIN
OrgTechName: Hegedus, Peter
OrgTechPhone: +1-203-341-2828
OrgTechEmail: [email protected]
It's a handy little link to keep around...

Peace,
HT