AS25512
CDT-MNT
Scanned 48m ago
📋 Summary
IP address summary information| Name | CDT-MNT |
| Website | http://www.cdt.cz |
| IPv4 addresses | 118K |
| IPv6 addresses | ~2^81 |
| ASN type | Transit |
| Registry | RIPE NCC |
| Allocated | Dec 17, 2002 |
| Updated | Jul 29, 2025 |
📊 IP Ranges
IPv4: 11 | IPv6: 1| Netblock | IP Count |
|---|---|
| 131.117.192.0/21 | 2.0K |
| 85.184.16.0/20 | 4.1K |
| 195.146.96.0/19 | 8.2K |
| 82.202.64.0/18 | 16K |
| 212.11.96.0/19 | 8.2K |
| 81.19.32.0/20 | 4.1K |
| 213.235.128.0/18 | 16K |
| 185.134.0.0/22 | 1.0K |
| 89.203.128.0/17 | 33K |
| 85.13.64.0/18 | 16K |
| 2001:1a48::/32 | 0 |
| 82.117.128.0/19 | 8.2K |
Prefix data from RIPE Stat / RIR allocation records.
📄 WHOIS
RIPE NCC| Handle | AS25512 |
| Name | CDT-AS |
| Organization | CDT-MNT |
| Website | http://www.cdt.cz |
| Status | active |
| Allocated | Dec 17, 2002 |
| Updated | Jul 29, 2025 |
Contacts
| Registrant | CDT-MNT |
| Abuse Contact | CDT hostmaster <abuse@cdt.cz> |
| Admin Contact | CDT hostmaster <abuse@cdt.cz> |
| Tech Contact | CDT hostmaster <abuse@cdt.cz> |
| Phone | +420 210021 699 |
| Address | CD-Telematika a.s. Pod Taborem 6 Praha 9 191 00 The Czech Republic |
Source: RIPE NCC
🔗 Peers
5 peers for this ASN⬆️ Upstreams
8 upstreams| ASN | Name |
|---|---|
| AS1299 | TWELVE99 Arelion Sweden AB |
| AS14840 | BR.Digital Telecom |
| AS174 | Cogent Communications, LLC |
| AS1764 | NEXTLAYER-AS Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH |
| AS33891 | CORE-BACKBONE Core-Backbone GmbH |
| AS6461 | Zayo Bandwidth |
| AS6939 | Hurricane Electric LLC |
| AS8218 | NEO-ASN Zayo Infrastructure France SA |
Upstream data from RIPE Stat routing history.
⬇️ Downstreams
32 downstreams| ASN | Name | Country |
|---|---|---|
| AS1299 | TWELVE99 Arelion Sweden AB | - |
| AS174 | Cogent Communications, LLC | - |
| AS1764 | NEXTLAYER-AS Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH | - |
| AS197019 | WEDOS WEDOS Internet, a.s. | - |
| AS197550 | ASINET4YOU Internet4you.cz, spol. s r.o. | - |
| AS200355 | CADCANET CadcaNet plus s. r. o. | - |
| AS200828 | THOSTING-AS TERMS a.s. | - |
| AS20609 | kazaczsro KAZA.cz s.r.o. | - |
| AS206159 | cz-fresh Fresh Data s.r.o. | - |
| AS20708 | SKODA-AUTO SKODA AUTO a.s. | - |
| AS213387 | TESUNET TeSuNet s.r.o. | - |
| AS216450 | prgaero Letiste Praha, a. s. | - |
| AS3161 | ASITPROFI IT PROFI s.r.o. | - |
| AS35046 | OMEGAPLUS-AS OMEGA plus Chrudim s.r.o. | - |
| AS43507 | RETE-AS RETE internet, s.r.o. | - |
| AS43614 | ECONOMIA-CZ Economia a.s. | - |
| AS44306 | Omonia OMONIA d.o.o. | - |
| AS47131 | PH PH, spol. s r. o. | - |
| AS47868 | SUPRO-AS AVONET, s.r.o. | - |
| AS48417 | ITS-CZ ITS akciova spolecnost | - |
| AS50975 | AVX_AS KYOCERA AVX Components s.r.o. | - |
| AS51331 | ModernTV SychrovNET s.r.o | - |
| AS51449 | KTUO-AS Kabelova televize Usti nad Orlici, spol. s r. o. | - |
| AS51524 | ASNETDELUXE Ales Tesacek | - |
| AS54113 | Fastly, Inc. | - |
| AS56450 | ALBERON_AS Alberon Letohrad s.r.o | - |
| AS56717 | RESAL-AS OG Soft s.r.o. | - |
| AS56827 | ASMIRNETCZ mirnet s.r.o. | - |
| AS60275 | AS_RVTECH RVTech s.r.o. | - |
| AS6204 | ZET-NET INTERKVM HOST SRL | - |
| AS6461 | Zayo Bandwidth | - |
| AS6881 | NIXCZ NIX.CZ z.s.p.o. | - |
🔒 RPKI / ROA
Source: rpki.zorn.ltd| Prefix | Origin ASN | Max Length | Validity |
|---|---|---|---|
| 131.117.192.0/21 | AS25512 | /21 | ✓ Valid |
| 85.184.16.0/20 | AS25512 | /20 | ✓ Valid |
| 195.146.96.0/19 | AS25512 | /19 | ✓ Valid |
| 82.202.64.0/18 | AS25512 | /18 | ✓ Valid |
| 212.11.96.0/19 | AS25512 | /19 | ✓ Valid |
| 81.19.32.0/20 | AS25512 | /20 | ✓ Valid |
| 213.235.128.0/18 | AS25512 | /18 | ✓ Valid |
| 185.134.0.0/22 | AS25512 | /22 | ✓ Valid |
| 89.203.128.0/17 | AS25512 | /17 | ✓ Valid |
| 85.13.64.0/18 | AS25512 | /18 | ✓ Valid |
| 82.117.128.0/19 | AS25512 | /19 | ✓ Valid |
RPKI validation powered by rpki.zorn.ltd (Routinator).