AS6855 Slovak Telekom, a.s.
IPv4 addresses
663,296
IPv6 /48 networks
590,086
RPKI
20 valid26 no ROA
Peers and downstreams
117
Holder
- AS name
- SK-TELEKOM
- Description
- Slovak Telekom / T-Mobile CZ
- Organisation
- Slovak Telekom, a.s.
- Registered in
- Bratislava, Slovakia
- Abuse contact
- abuse@telekom.sk
- Assigned
- 1996-12-02
- Registered
- 1970-01-01
- Record last changed
- 2020-11-02 09:17 UTC
178.40.0.0/15185.58.102.0/24185.58.103.0/24193.200.143.0/24193.201.110.0/24193.228.234.0/24193.84.245.0/24193.84.7.0/24193.84.96.0/24193.84.97.0/24193.84.98.0/23194.154.224.0/19194.169.224.0/24194.48.241.0/24194.50.215.0/24195.146.128.0/19195.146.130.0/24195.216.240.0/24195.91.0.0/17212.5.192.0/19213.160.160.0/19213.81.128.0/1778.98.0.0/1584.47.0.0/1785.239.68.0/2485.239.69.0/2485.239.80.0/2385.239.82.0/2385.239.84.0/2285.248.31.0/2485.248.74.0/2487.197.0.0/1691.127.0.0/1691.195.106.0/2491.195.107.0/2491.245.16.0/2395.102.0.0/15
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Upstream graph
Upstreams and their upstreams, from BGP pathsNetwork health
Grade C · 71/100| partly | Prefixes covered by valid ROAs 20 of 46 announced prefixes are RPKI valid, 26 have no ROA. |
11/25 |
| pass | No RPKI invalid announcements None of the announcements is RPKI invalid. |
10/10 |
| pass | Announces IPv6 9 IPv6 prefixes. |
15/15 |
| pass | More than one upstream 5 upstreams seen in BGP. |
10/10 |
| pass | Working abuse contact abuse@telekom.sk is published. |
15/15 |
| fail | Publishes a geofeed No geofeed found. Without one, location databases have to guess. |
0/10 |
| pass | No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger. |
10/10 |
| fail | Registry record maintained Last changed 2020-11-02. |
0/5 |
Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.
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Routing changes
Last 30 days| 2026-10-04 07:41 UTC | Neighbour gone | AS49121 | downstream |
| 2026-10-04 07:41 UTC | New neighbour | AS207434 | downstream |
| 2026-10-04 07:41 UTC | Relationship changed | AS6663 | upstream to peer |
| 2026-10-04 07:41 UTC | Relationship changed | AS47232 | upstream to peer |
| 2026-10-04 07:41 UTC | Relationship changed | AS44185 | upstream to peer |
| 2026-10-04 07:41 UTC | Relationship changed | AS2852 | upstream to peer |
| 2026-10-04 07:41 UTC | Relationship changed | AS2607 | upstream to peer |
| 2026-10-04 07:41 UTC | Relationship changed | AS15935 | upstream to peer |
WHOIS
aut-num: AS6855 as-name: SK-TELEKOM descr: Slovak Telekom / T-Mobile CZ org: ORG-ST4-RIPE remarks: -------------- remarks: -- Upstream -- remarks: -------------- remarks: ------------- remarks: -- Peering -- remarks: ------------- remarks: ---------------- remarks: -- Upstream -- remarks: -------------- remarks: ------------- remarks: -- Peering -- remarks: ------------- remarks: ---------------- remarks: ============================== remarks: Communities to control traffic remarks: 6855:1101 Do not announce to SIX remarks: 6855:1102 Do not announce to DT AS3320 remarks: 6855:1107 Do not announce to TeliaSonera AS1299 remarks: 6855:1201 Prepend 6855 when announcing to SIX remarks: 6855:1202 Prepend 6855 when announcing to AS3320 remarks: 6855:1207 Prepend 6855 when announcing to AS1299 remarks: 6855:1301 Prepend 6855 6855 when announcing to SIX remarks: 6855:1302 Prepend 6855 6855 when announcing to AS3320 remarks: 6855:1307 Prepend 6855 6855 when announcing to AS1299 remarks: 6855:50 SET_LOCAL_PREFERENCE to 50 remarks: 6855:90 SET_LOCAL_PREFERENCE to 90 remarks: LOC_PREF settings remarks: 50 Customer routes - GLOBAL BACKUP remarks: 60 Upstream providers remarks: 70 Peering partners remarks: 90 Customer routes - BACKUP links with ST AS6855 remarks: 100 Customer routes - PRIMARY connections remarks: Other: remarks: DSCP = 0 on ANY connection remarks: (upstream, peer, customers, dial customers, VPN customers) remarks: ================ remarks: Route colouring: remarks: 6855:2401 Routes from SIX peering remarks: 6855:2402 Routes from DT remarks: 6855:2407 Routes from TeliaSonera remarks: 6855:2700 Default route remarks: POP NAME POP ID PA comm strings PI comm strings remarks: <name> xx 6855:26xx 6855:25xx remarks: ================================================== admin-c: STIP-RIPE tech-c: STIP-RIPE status: ASSIGNED mnt-by: RIPE-NCC-END-MNT mnt-by: SK-TELECOM-MNT created: 1970-01-01T00:00:00Z last-modified: 2020-11-02T09:17:37Z source: RIPE % 8 routing policy lines (import/export) not shown