AS15069 — SBA

AS15069 announces 1 IPv4 prefixes covering 4,096 addresses and 0 IPv6 prefixes.

About this network

The carrier owns the block; the customer owns the reverse zone.

What it's used for

• An association management company's network. A single IPv4 /20 announced from the United States, no IPv6, and four observed BGP neighbours.

Notable

• The block is registered to a carrier under the netname COGENT-A, not to the holder.
• All three sampled addresses answered, under the holder's own domain, in the form i38-106-212-0.ip-addr.smithbucklin.com.
• Those names put the address inside a dedicated subdomain and prefix it with a single letter, so the label never begins with a digit.
• The AS handle is SBA, three letters, matching nothing else in the record.

Interesting

• This is the reverse of the usual arrangement in this range. Most holders own their address space and let a carrier publish the reverse names; here the carrier owns the space and the customer runs the reverse zone under its own domain. Anything identifying organisations by reverse name gets this one right and anything reading the registry gets it wrong.
• The leading letter is a real convention rather than decoration. Host name labels that start with a digit have historically confused older software, and prefixing a letter sidesteps that for every address in the block.
• A dedicated subdomain for address-derived names keeps them out of the namespace used for real services, which is tidy and makes the zone trivially generated.
• Four upstreams behind one block is more transit than the space needs.

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

Announced prefixes

• 38.106.208.0/20

Upstream networks

• AS174 Cogent Communications, LLC
• AS22925 Allied Telecom Group, LLC
• AS3356 Level 3 Parent, LLC
• AS36086 Telx

Adjacent networks

• AS174 Cogent Communications, LLC
• AS22925 Allied Telecom Group, LLC
• AS3356 Level 3 Parent, LLC
• AS36086 Telx