AS15663 — UMBRIA_NET

AS15663 announces 2 IPv4 prefixes covering 9,216 addresses and 0 IPv6 prefixes.

About this network

An underscore in the AS handle, and two netname dates written in two different year formats.

What it's used for

• A regional provider. Two IPv4 prefixes announced from Italy, no IPv6, nine thousand addresses, across two observed BGP neighbours.

Notable

• The AS handle joins two words with an underscore, a character that almost never appears in this field and is not permitted in hostnames.
• The two netnames share a country code and a four-letter brand that is not the company's, but one ends in a six-digit date with a two-digit year and the other in an eight-digit date with a full one.
• The two dates are nineteen years apart, which is how long that brand has survived in the records.
• Both blocks list the company and an abuse role, with nothing unusual in the contacts.
• Six addresses were queried for reverse DNS and none returned a name.
• No IPv6 is announced.

Interesting

• The year format changing between two blocks of the same holder is a dating method. Anything with the short year was filed before the changeover, whatever the record itself claims.
• An underscore in a handle is harmless where handles are just strings and awkward everywhere they get reused as names. This one has survived twenty-five years of being copied around.
• Two routes, two upstreams and nine thousand addresses is a provider that has stayed the size it started at, adding one block in two decades.

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

Announced prefixes

• 185.203.76.0/22
• 212.39.0.0/19

Upstream networks

• AS41327 Fiber Telecom S.p.A.
• AS20912 Giuliano Claudio Peritore trading as "Panservice s.a.s. di Cuseo Fabrizio & C."

Adjacent networks

• AS41327 Fiber Telecom S.p.A.
• AS20912 Giuliano Claudio Peritore trading as "Panservice s.a.s. di Cuseo Fabrizio & C."