Autonomous system
AS12785 SI-ZVD
Unclassified RIPE
Summary
ZVD (Institute of Occupational Safety)
business enterprise
A single /24 and an AS number, held by an occupational safety institute.
What it's used for
- Networking for a Slovenian occupational-safety organisation. 256 addresses in one IPv4 prefix, one observed BGP neighbour, and no IPv6 announced.
Notable
- The entire inventory is
91.223.230.0/24. - The RDAP record for that block could not be retrieved, so its registration was not read.
- The AS handle is
SI-ZVD; the registered holder is ZVD Zavod za varstvo pri delu d.d. - Three sampled addresses were queried and none returned a name.
Interesting
- 256 addresses is the smallest block the global routing table will normally accept, and this organisation runs an autonomous system for exactly one of them. The threshold matters: a prefix longer than a
/24is filtered by most operators, so/24is the floor for anyone who wants to be independently routable at all. - An institute in this line of work holds registers, certifications and measurement records that employers have to reach, which is the usual reason a non-technical organisation ends up with its own AS number. The alternative is depending on a provider's addresses and renumbering every time the contract changes.
91.223is late European allocation space, handed out in/24and/22pieces when the large blocks were gone. The size of an organisation's oldest block is a rough clock: the smaller it is, the later they arrived.
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.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS34779 | T-2, d.o.o. | 59 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| SI | Slovenia | 1 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS12785- Registry name
- SI-ZVD
- Registrant
- MNT-T-2
- Abuse contact
- abuse@t-2.com
- Registered
- 2011-09-28
- Last changed
- 2018-09-04
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 1 valid, 0 with no ROA
- ROAs
- 1 authorising AS12785
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 2 naming AS12785
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: 442 networks and 1,783 prefixes, as published 2026-10-17. 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