Autonomous system
AS51744 ASJABLONKA
Unclassified RIPE
Summary
Jablonka.cz
non-profit regional network
ASJABLONKA is operated by Jablonka.cz, a Czech non-profit organization.
What it's used for
- The address space carries the organization's own network infrastructure, identified by the netname
JABLONKA-NETand registrantNon-profit organization Jablonka.cz. - The AS announces 1024 IPv4 addresses within a single /22 prefix and 1 IPv6 /48 prefix, while maintaining 26 observed routing neighbours.
- As a non-profit association that has built a fast computer network, the traffic consists of the organization's own data and service endpoints rather than commercial subscriber eyeballs.
Notable
- The RDAP registrant
Non-profit organization Jablonka.czmatches the AS holder and the netnameJABLONKA-NET. - The address inventory is compact, consisting of one contiguous IPv4 block and a single IPv6 prefix, consistent with a dedicated internal or regional network estate.
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 |
|---|---|---|
| Peering.cz | Prague, Czech Republic | 185.0.20.96 |
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 · 1.02K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CZ | Czechia | 2 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS51744- Registry name
- ASJABLONKA
- Registrant
- JABLONKA-MNT
- Abuse contact
- abuse@jablonka.cz
- Registered
- 2010-10-29
- Last changed
- 2023-02-09
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS51744
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 2 naming AS51744
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