Autonomous system
AS16281 UTELISYS Utelisys Communications B.V.
Unclassified APNIC
Summary
Utelisys Communications
isp hosting transit
The handle carries a city and a country, and the newest netnames add a digit that separates nothing.
What it's used for
- A communications provider's network. Five prefixes announced from the Netherlands, one of them IPv6, six thousand one hundred and forty-four addresses, through two observed BGP neighbours.
Notable
- The AS handle is the brand followed by a city and a country, so the field doubles as a postal location in a database that already records the country separately.
- Two blocks use a country code, the brand, and a full date, thirteen years apart.
- Two more append a numeral to the brand and share a single later date between them. The numeral distinguishes the pair from the earlier blocks rather than from each other, so the two newest registrations are indistinguishable by name.
- Every block lists the same three contacts: the company, a contact role named after it, and an abuse role.
- The smallest two blocks are the ones sharing a name.
- Twelve addresses were queried for reverse DNS and none returned a name.
Interesting
- A digit appended to a brand in a netname usually means the operator ran out of ways to say the same thing. It marks a batch rather than a block, which works until somebody needs to tell two members of the batch apart.
- Two upstreams and six thousand addresses is a provider whose customers are other networks. The address count says little; the absence of published names says the addresses are handed on rather than used.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-12, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 6.14K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| NL | Netherlands | 5 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS16281- Registry name
- UTELISYS
- Registrant
- Utelisys Communications B.V.
- Abuse contact
- noc@utelisys.com
- Registered
- 2001-11-13
- Last changed
- 2017-11-15
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 5 valid, 0 with no ROA
- ROAs
- 5 authorising AS16281
- ASPA
- no ASPA record
- IRR
- 100% registered · 5 of 5 announcements
- Route objects
- 5 naming AS16281
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 455 networks and 1,849 prefixes, as published 2026-11-13. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere