AS13765 — NEDELCO

AS13765 announces 4 IPv4 prefixes covering 14,336 addresses and 1 IPv6 prefixes.

About this network

Three company names for one network, and reverse records that put the address in front of the domain with its dots intact.

What it's used for

• A rural telephone and internet provider. 14,336 addresses across four IPv4 prefixes, the IPv6 block 2606:4900::/32, and eleven observed BGP neighbours.

Notable

• The AS is held by one company, every block is registered to a second, and one block's netname and reverse zone name a third.
• Most addresses answer as 66.196.59.254.dynamic.hamilton.net, the address in dotted form with a domain appended.
• One block answers as 207-68-212-0.nctc.net, hyphenated and under the third name.
• Netnames run HAMILTON-INTERNET, HAMILTON and NCTCNET.
• Twelve addresses were queried for reverse DNS and seven returned a name.

Interesting

• Leaving the dots in the address makes the hostname read as an address with a suffix, which is unusual because dots are what separate DNS labels. Each octet becomes its own label, so the name is four levels deeper than the hyphenated form and points at the same thing.
• Marking those addresses as dynamic in the name tells any receiving system how much to trust them, which is the same signal a mail server would look for.
• One block using an entirely different brand in both the registry and the DNS is a merged network that was never renamed. The hyphenated scheme came with it.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 66.196.48.0/20
• 96.31.176.0/20
• 96.46.104.0/21
• 207.68.208.0/20
• 2606:4900::/32

Upstream networks

• AS16851 NebraskaLink
• AS3356 Level 3 Parent, LLC
• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC

Downstream networks

• AS6621 Hughes Network Systems, LLC
• AS11949 COZAD TELEPHONE COMPANY
• AS21818 BWTelcom
• AS16954 Three River Telco

Adjacent networks

• AS6621 Hughes Network Systems, LLC
• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS3356 Level 3 Parent, LLC
• AS16851 NebraskaLink
• AS11949 COZAD TELEPHONE COMPANY
• AS21818 BWTelcom
• AS16954 Three River Telco

Internet exchanges

• Interconnection eXchange Denver — Denver, United States