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ASN Lookup Tool
AS257 DNIC-AS-00257

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS257
Organisation
Navy Network Information Center (NNIC)
Name
DNIC-AS-00257
Total IPv4 Addresses
1,004
Total IPv4 Prefixes
11
Total IPv6 Prefixes
5
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#43,231 out of 78,221
Registry
Arin
Registered Country
US flag US
Registered Country Name
United States of America (the)
Registered Date
1988-12-22
Registration Last Change
2011-07-05
Receiving From

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

ASN
Organisation
AS2152
US flagCENIC
AS2153
US flagCENIC
IPv4 Active Prefixes

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

Prefix137.164.24.188/31
Range From137.164.24.188
Range To137.164.24.189
Prefix137.164.50.148/30
Range From137.164.50.148
Range To137.164.50.151
Prefix137.164.50.252/30
Range From137.164.50.252
Range To137.164.50.255
Prefix204.102.228.0/25
Range From204.102.228.0
Range To204.102.228.127
Prefix204.102.228.128/25
Range From204.102.228.128
Range To204.102.228.255
Showing 5 of 11
IPv6 Active Prefixes
Prefix2607:f380:1::108:9a41:8bc0/123
Range From2607:f380:1::108:9a41:8bc0
Range To2607:f380:1::108:9a41:8bdf
Prefix2607:f380:1::118:9a43:2940/122
Range From2607:f380:1::118:9a43:2940
Range To2607:f380:1::118:9a43:297f
Prefix2607:f380:1::118:9a43:2fc0/122
Range From2607:f380:1::118:9a43:2fc0
Range To2607:f380:1::118:9a43:2fff
Prefix2607:f380:1::11c:c66e:6700/123
Range From2607:f380:1::11c:c66e:6700
Range To2607:f380:1::11c:c66e:671f
Prefix2607:f380:804::/48
Range From2607:f380:804::
Range To2607:f380:804:ffff:ffff:ffff:ffff:ffff
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.