Autonomous system
AS12687 URAN Kiev, Ukraine
Unclassified RIPE
Summary
URAN
research education
Ukraine's research network, whose reverse DNS labels which addresses are network and broadcast addresses.
What it's used for
- The national research and academic network. 3,584 addresses in ten IPv4 prefixes, sixteen IPv6 prefixes, and 34 observed BGP neighbours.
Notable
- Most blocks share the netname
UA-URAN-990525, dated May 1999. - Two are named for what they carry:
URAN-REGIONS-NETandURAN-POLTAVA-NET. 212.111.201.0/24is registered to Infonet-Telecom, a separate holder.- The IPv6 announcements form a doubling ladder: a
/48, two/47s, then a/45,/44,/43,/42,/41,/40and/39. - Two sampled addresses answered, as
netaddr-192-128.reverse.uran.uaandbraddr-192-255.reverse.uran.ua.
Interesting
netaddrandbraddrare the network and broadcast addresses of a subnet, the first and last of the range, neither of which can be assigned to a machine. Naming them publishes the internal subnetting plan:.128being a network address means the/24is cut into halves, and anyone reading the reverse zone can map the boundaries without touching the network.- That doubling ladder of IPv6 prefixes is what happens when a range that is not a single power-of-two block gets expressed in CIDR. Each successive prefix is twice the last, filling the range greedily from the bottom up, and the gaps in the sequence mark the pieces held back.
- Announcing sixteen IPv6 prefixes against ten IPv4 ones is an inversion of the usual ratio. Research networks ran IPv6 in production while commercial providers were still describing it as a future concern, and the shape of the announcements still shows it.
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
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| RUDAKI-IX | Kiev, Ukraine | 185.1.225.38 |
Transit providers
7 upstream, 16 downstream and 32 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 10 prefixes · 3.58K addresses IPv6 16 prefixes
| Country | Name | Prefixes |
|---|---|---|
| UA | Ukraine | 26 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS12687- Registry name
- URAN
- Registrant
- User Association of Ukrainian Research and Academic Network URAN
- Abuse contact
- abuse@uran.ua
- Registered
- 1970-01-01
- Last changed
- 2026-10-08
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 8 valid, 0 with no ROA
- ROAs
- 14 authorising AS12687
- ASPA
- no ASPA record
- IRR
- 100% registered · 8 of 8 announcements
- Route objects
- 17 naming AS12687
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 1,773 prefixes, as published 2026-10-13. 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