Autonomous system
AS51155 TBTELECOM
Unclassified RIPE
Summary
Citylink Telecom
isp residential cable dsl
TBTELECOM is operated by Citylink Telecom Sp. z o.o.
What it's used for
- The address space carries residential and business internet access, evidenced by the netnames
PL-TBTELECOM-20100520andTelemedian-TBassociated with the announced prefixes. - The AS announces 5120 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, while maintaining 27 observed neighbours; this ratio of moderate address space to a significant number of peering partners indicates a regional access provider rather than a transit hub.
- Traffic from this network consists of subscriber eyeballs for cable and DSL services, consistent with the operator's classification as a Cable/DSL/ISP in Gdansk.
Notable
- Registrants align with the announcer, with
Citylink Telecom Sp. z o.o.holding the larger block andTelemedian Sp. z o.o.holding the smaller block, suggesting a corporate relationship or acquisition history between the two entities. - The inventory consists of two distinct IPv4 blocks and one IPv6 /32, reflecting a standard regional ISP footprint without unusual fragmentation.
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 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Warsaw | Warsaw, Poland | 195.182.218.119 |
| POMIX | Gdansk, Poland | 185.0.16.66 |
Transit providers
9 upstream, 4 downstream and 16 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 2 prefixes · 5.12K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PL | Poland | 3 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS51155- Registry name
- TBTELECOM
- Registrant
- AS51155-MNT
- Abuse contact
- ripe@tbtelecom.pl
- Registered
- 2010-06-09
- Last changed
- 2024-10-03
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 4 valid, 0 with no ROA
- ROAs
- 5 authorising AS51155
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 7 naming AS51155
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