AS51155 TBTELECOM Citylink Telecom Sp. z o.o.
🇵🇱Org handle: ORG-TTSz1-RIPE
RIPE NCCallocated
Announced Prefixes (BGP)
4total
3 IPv41 IPv6
IPv4 Addresses
Allocated (RIR)7,424
Announced (BGP)5,120
IPv6 Addresses
Allocated (RIR)7.9×10²⁸
Announced (BGP)7.9×10²⁸
Routing hygiene
Score 5/100 · Low riskRPKI ROA coverage
100%
no RPKI invalid prefixes
IRR route objects
100%
no origin mismatches
Hijack signals
0
0 announced against others' ROAs, 0 own announced by others
Upstreams
2
diversity 50/100
- All announced prefixes have a valid ROA and a matching IRR route object
Based on 4 announced prefixes, updated daily (2026-10-25). How the score works · RPKI explained
Announced Prefixes
(BGP)4|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | RIPE | 2026-10-26 | |
| Valid | RIPE | 2026-10-26 | |
| Valid | RIPE | 2026-10-26 | |
| Valid | RIPE | 2026-10-26 |
Allocated Prefixes
(RIR)5Prefix | Country | RIR | Status |
|---|---|---|---|
| 46.227.32.0/21 | 🇵🇱 PL | RIPENCC | allocated |
| 178.19.176.0/20 | 🇵🇱 PL | RIPENCC | allocated |
| 185.6.28.0/22 | 🇵🇱 PL | RIPENCC | allocated |
| 185.6.28.0/24 | 🇵🇱 PL | RIPE | assigned |
| 2a02:26e8::/32 | 🇵🇱 PL | RIPENCC | allocated |
All 4 announced prefixes of AS51155 →
Downstream Customers(1)
| ASN | Name |
|---|---|
| AS214762 | 🇵🇱MATHOST Sebastian Stefanek trading as MatHost.eu |
BGP Neighbours
(seen in AS paths)Upstreams (2)
Networks AS51155 hands its own prefixes to: transit providers, or peers at an exchange.
Downstreams (3)
Networks whose own prefixes AS51155 passes on: usually its customers.
Abuse Contact
External Links
Learn more
- What is an ASN?Autonomous systems, ASN ranges and how they are assigned
- RPKI and route origin validationWhat the RPKI badges on the prefix list mean
- How to run an ASPA checkVerify the upstream providers listed above
- IPv4 transfers in the RIPE NCC regionMonthly volume and the latest registry transfers
- ASN data in AI agents and SIEMMCP server and API integrations
API
Open https://api.ipctl.io/v1/asn/51155Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/51155" | jq