ASN Lookup Tool
AS17231 ATT-CERFNET-BLOCK

Powered By:
ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS17231
Organisation
AT&T Enhanced Network Services
Name
ATT-CERFNET-BLOCK
Total IPv4 Addresses
50176
Total IPv4 Prefixes
47
Total IPv6 Prefixes
0
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#4,163 out of 76,955
Registry
Arin
Registered Country
US flag US
Registered Country Name
United States of America (the)
Registered Date
2000-08-09
Registration Last Change
2000-08-09
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
US flagAT&T Services, Inc.
IPv4 Active Prefixes

This provides the list of IPv4 address space routes/prefixes currently announced on Border Gateway Protocol (BGP).

Range From12.66.32.0
Range To12.66.47.255
Range From12.66.63.0
Range To12.66.63.255
Range From12.66.64.0
Range To12.66.64.255
Range From12.66.65.0
Range To12.66.65.255
Range From12.66.66.0
Range To12.66.66.255
Showing 5 of 47
Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.