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ASN Lookup Tool
AS17227 ATT-CERFNET-BLOCK

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS17227
Organisation
AT&T Enhanced Network Services
Name
ATT-CERFNET-BLOCK
Total IPv4 Addresses
37632
Total IPv4 Prefixes
53
Total IPv6 Prefixes
0
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#4,691 out of 77,323
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
AS7018
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).

Prefix12.66.62.0/24
Range From12.66.62.0
Range To12.66.62.255
Prefix12.66.85.0/24
Range From12.66.85.0
Range To12.66.85.255
Prefix12.66.86.0/23
Range From12.66.86.0
Range To12.66.87.255
Prefix12.66.88.0/21
Range From12.66.88.0
Range To12.66.95.255
Prefix12.66.96.0/21
Range From12.66.96.0
Range To12.66.103.255
Showing 5 of 53
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.