AS16399 — FIRSTCOMM-AS2

AS16399 announces 20 IPv4 prefixes covering 127,232 addresses and 3 IPv6 prefixes.

About this network

The netnames are numbered two, four, six, seven, eight and nine, and the number two is used three times.

What it's used for

• A provider's network. Thirty-six prefixes announced from the United States, three of them IPv6, one hundred and twenty-seven thousand two hundred and thirty-two addresses, through seven observed BGP neighbours.

Notable

• Most netnames are the company's short name, the word for a network, and a numeral. The numerals skip values, and the lowest one appears on three separate blocks.
• Four more blocks carry a five-letter name from an acquired provider, with no numeral and no date.
• The numbered blocks list three contacts each: the company, a systems administration team, and an abuse contact under the company's initials. The acquired blocks list the company alone.
• Nine of eighteen queried addresses answered, across four domains in three styles. Some write the address hyphenated with a label naming the protocol version. Some write it hyphenated with the word for a static assignment. Two write it backwards, one with a label for a business line and one for a leased line.
• One answer is a customer's own domain with a single number after the word for a host.

Interesting

• Numbering your networks only works if you keep the list. Gaps and repeats mean the numbering outlived whoever was tracking it, which is what happens when a provider grows by acquisition.
• Four reverse-name conventions on one network is four acquisitions' worth of DNS that was never consolidated. Each one still resolves, which is the only test that ever mattered.

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

Announced prefixes

• 64.27.128.0/19
• 66.244.160.0/19
• 67.206.64.0/23
• 67.206.67.0/24
• 67.206.68.0/22
• 67.206.72.0/21
• 67.206.80.0/20
• 69.7.192.0/19
• 74.222.32.0/19
• 168.92.0.0/19
• 168.93.64.0/18
• 168.93.128.0/18
• 207.135.160.0/19
• 209.45.176.0/24
• 209.170.160.0/20
• 216.21.32.0/19
• 216.126.206.0/24
• 216.130.96.0/19
• 216.146.64.0/19
• 216.159.224.0/19
• 2606:7d80:1000::/36
• 2606:7d80:2000::/35
• 2606:7d80:4000::/34

Upstream networks

• AS6461 Zayo Bandwidth
• AS40264 Charter Communications LLC
• AS3356 Level 3 Parent, LLC
• AS174 Cogent Communications, LLC
• AS55089 THE SEGERDAHL CORP.

Downstream networks

• AS22214 Medela Inc

Adjacent networks

• AS6461 Zayo Bandwidth
• AS40264 Charter Communications LLC
• AS3356 Level 3 Parent, LLC
• AS174 Cogent Communications, LLC
• AS22214 Medela Inc
• AS10796 Charter Communications Inc
• AS55089 THE SEGERDAHL CORP.