AS13351 — B-U-C
AS13351 announces 1 IPv4 prefixes covering 4,096 addresses and 1 IPv6 prefixes.
About this network
One IPv4 prefix and twenty-nine IPv6 ones, whose sizes climb by doubling.
What it's used for
- A municipal utility commission running an internet service in Kentucky. 4,096 addresses in the single IPv4 prefix 23.252.128.0/20, five observed BGP neighbours, and twenty-nine IPv6 prefixes.
Notable
- The IPv6 announcements begin 2604:5cc0::/46, 2604:5cc0:4::/48, 2604:5cc0:5::/48, 2604:5cc0:6::/47, 2604:5cc0:8::/45 and continue widening: /44, /43, /42, /41, /40.
- The block is netname BARBOURVILLE-UTILITY, registered to the utility commission.
- A sampled name reads user-23-252-139-254.barbourville.com.
- First observed in the routing archive in January 2001.
Interesting
- That ladder of doubling prefix sizes is what a tool produces when it converts an address range into the smallest set of aligned blocks that covers it. Each rung is the largest block that fits at that point in the range. The network is announcing every rung individually instead of the one covering block that contains them all.
- Twenty-nine routes where one would do is twenty-nine entries in every router on the internet that accepts them. The covering allocation is almost certainly a single assignment.
- A town's electricity and water authority operating an internet service is a pattern in places where the incumbent carrier never built out. The utility already had the poles, the right of way and the billing relationship with every household.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 23.252.128.0/20
- 2604:5cc0::/32
Upstream networks
Downstream networks
Adjacent networks
BGP / ASN / CIDR
awaiting query
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IPv4
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IPv6
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Search Results
IPv4 Prefixes
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IPv6 Prefixes
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Total Prefixes
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Unique /24s
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⚠ SUSPICIOUS PREFIX ANNOUNCEMENTS DETECTED