AS5606 — GTS-BACKBONE GTS Telecom SRL

AS5606 announces 102 IPv4 prefixes covering 91,904 addresses and 4 IPv6 prefixes.

About this network

GTS-BACKBONE is the backbone AS of GTS Telecom SRL, the Romanian operator of the former GTS Central Europe group, headquartered on Strada Izvor in Bucharest. Deutsche Telekom acquired GTS Central Europe in 2014, and GTS Telecom has been part of the Deutsche Telekom group since.

What it's used for

Business-grade connectivity in Romania: IP transit, fibre and cross-border capacity, VPN services and data-centre hosting, delivered over GTS's own network and direct interconnects with tier-1 carriers. Roughly 92,000 IPv4 addresses.

Notable

This is a corporate carrier rather than a consumer ISP — the customer base is companies and institutions, so addresses here generally front business sites and hosted infrastructure. The RIPE object still publishes a 24x7 NOC contact, a small tell of a network run for enterprise SLAs.

Interesting

The Czech side of the same group kept its own registration and number — see AS5588. Two ASNs, one corporate history, and neither one inherits the other's shape: the Romanian AS is the local backbone, not a branch of the Czech one.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 5.35.208.0/21
• 31.14.21.0/24
• 37.156.182.0/23
• 45.14.236.0/24
• 45.14.238.0/23
• 45.67.36.0/24
• 45.67.38.0/23
• 45.82.28.0/23
• 46.102.144.0/22
• 77.81.2.0/24
• 80.97.48.0/24
• 80.97.126.0/23
• 81.180.144.0/23
• 81.180.250.0/23
• 81.181.252.0/22
• 84.247.23.0/24
• 84.247.28.0/24
• 85.9.0.0/18
• 85.120.16.0/22
• 85.120.28.0/23
• 85.120.33.0/24
• 85.120.61.0/24
• 85.122.182.0/23
• 85.204.75.0/24
• 85.204.108.0/24
• 86.104.3.0/24
• 86.104.17.0/24
• 87.237.104.0/22
• 87.237.110.0/23
• 89.33.236.0/23
• 89.34.101.0/24
• 89.37.143.0/24
• 89.38.57.0/24
• 89.38.59.0/24
• 89.38.231.0/24
• 89.38.241.0/24
• 89.39.7.0/24
• 89.39.68.0/24
• 89.40.16.0/22
• 89.40.132.0/24
• 89.41.31.0/24
• 89.44.121.0/24
• 89.44.200.0/24
• 89.45.168.0/21
• 89.46.6.0/24
• 91.194.235.0/24
• 91.199.216.0/24
• 91.212.231.0/24
• 91.212.240.0/24
• 91.212.246.0/24
• 91.212.255.0/24
• 92.114.2.0/23
• 93.113.30.0/24
• 93.113.58.0/23
• 93.115.112.0/21
• 93.119.152.0/23
• 93.174.160.0/24
• 93.174.162.0/24
• 93.174.167.0/24
• 109.205.88.0/23
• 109.205.90.0/24
• 109.205.95.0/24
• 128.140.224.0/21
• 176.223.110.0/24
• 176.223.114.0/24
• 185.8.152.0/22
• 185.131.222.0/24
• 185.171.186.0/24
• 185.181.240.0/22
• 185.220.184.0/23
• 185.220.186.0/24
• 188.208.101.0/24
• 188.211.236.0/23
• 188.212.37.0/24
• 188.212.152.0/24
• 188.213.33.0/24
• 188.213.132.0/23
• 188.214.105.0/24
• 188.240.0.0/24
• 188.241.72.0/22
• 188.241.222.0/24
• 193.16.144.0/24
• 193.41.251.0/24
• 193.143.120.0/24
• 193.200.62.0/23
• 193.226.68.0/22
• 193.226.128.0/20
• 193.226.144.0/24
• 193.226.146.0/23
• 193.226.148.0/23
• 193.226.151.0/24
• 193.226.152.0/21
• 193.226.160.0/19
• 193.231.127.0/24
• 194.50.126.0/24
• 194.102.91.0/24
• 194.102.238.0/24
• 194.105.1.0/24
• 195.246.242.0/23
• 212.146.64.0/18

and 6 more.

Upstream networks

• AS1299 Arelion Sweden AB
• AS3356 Level 3 Parent, LLC
• AS6939 Hurricane Electric LLC
• AS3257 GTT Communications Inc.
• AS174 Cogent Communications, LLC
• AS34549 meerfarbig GmbH & Co. KG
• AS8708 DIGI ROMANIA S.A.
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS213241 TECHIT.BE SRL
• AS24482 SG.GS
• AS37721 Virtual Technologies & Solutions
• AS34019 Hivane Association
• AS17639 Converge ICT Solutions Inc.
• AS212024 Marc Schmitt
• AS20485 Joint Stock Company TransTeleCom
• AS8551 Bezeq International Ltd.
• AS3303 Swisscom (Schweiz) AG
• AS12552 GlobalConnect AB
• AS12779 IT.Gate S.p.A.
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS48362 Stadtwerke Feldkirch
• AS50300 CustodianDC Limited
• AS37100 SEACOM Limited
• AS293 ESnet
• AS50673 Serverius Holding B.V.

Downstream networks

• AS44043 Cyber_Folks SRL
• AS34358 Cyber_Folks SRL
• AS203053 CLAUS WEB srl
• AS43927 HOSTERION SRL
• AS211611 Exim Host SRL
• AS50084 S.A."Rapid Link" S.R.L.
• AS58247 SC NETVEILLANCE SRL
• AS41028 CobraTELECOM SRL
• AS212192 INTELI TECH DEVELOPMENT SRL
• AS9064 Internet City Doi SA
• AS33839 ALTAIR NET SRL
• AS211701 BUSINESS SOFTWARE DEVELOPMENT SRL
• AS60509 S 800 Customer Service Provider SRL
• AS201387 Luxoft Professional Romania S.R.L.
• AS33925 Global Internet Solutions SRL
• AS209537 Vying Technologies OU
• AS44418 Bitdefender SRL
• AS19197 Stefanini, Inc.
• AS212221 INTERNET BROKER SRL
• AS39312 Luxoft Professional Romania S.R.L.
• AS28763 Nobel Group Limited
• AS47388 Dante International SA
• AS34283 Alten Delivery Center Eastern Europe SRL
• AS57646 Alef Distribution RO SA
• AS9176 TOP EDGE ENGINEERING S.R.L.

Adjacent networks

• AS1299 Arelion Sweden AB
• AS3356 Level 3 Parent, LLC
• AS44043 Cyber_Folks SRL
• AS34358 Cyber_Folks SRL
• AS6939 Hurricane Electric LLC
• AS203053 CLAUS WEB srl
• AS3257 GTT Communications Inc.
• AS34549 meerfarbig GmbH & Co. KG
• AS174 Cogent Communications, LLC
• AS8708 DIGI ROMANIA S.A.
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS43927 HOSTERION SRL
• AS50084 S.A."Rapid Link" S.R.L.
• AS24482 SG.GS
• AS37721 Virtual Technologies & Solutions
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS50673 Serverius Holding B.V.
• AS37100 SEACOM Limited
• AS213241 TECHIT.BE SRL
• AS4657 StarHub Ltd
• AS49074 SC TECHNOLOGICAL SRL
• AS8551 Bezeq International Ltd.
• AS12552 GlobalConnect AB
• AS50300 CustodianDC Limited
• AS17639 Converge ICT Solutions Inc.

Routing security

• RPKI: 108 valid, 0 invalid and 30 not-found announcements; 104 ROAs.
• ASPA: none published.
• IRR: 96% of announcements registered; 180 route objects.
• Listed in as-sets: AS-4750-TRANSIT, AS-CLAUS-WEB, AS-CSL-DOMESTIC-TRANSIT, AS-CSLOXINFO-TRANSIT, AS-DATANET, AS-GTSRO, AS-KPNQWESTRO, AS-KQFR-INTL, AS-KQRONIX, AS-MANDA-AMSIX-PEERS-V4, AS-MANDA-AMSIX-PEERS-V6, AS-MANDA-DECIX-PEERS-V4, AS-MANDA-DECIX-PEERS-V6, AS-RETN-ACTUAL-V4, AS-RETN-ACTUAL-V6, AS-VIX-MEMBERS, AS203462:AS-NVC-DECIX_FRA_RS, AS3303:AS-SWCMPEERS, AS6695:AS-DECIX-FRA-CONNECTED, AS6695:AS-DECIX-FRA-RS, AS6695:AS-DECIX-FRA-RS-V6, AS6777:AS-AMS-IX-RS, AS6777:AS-AMS-IX-RS-V6, AS680:AS-AMSIX-RS-PEERS.

Internet exchanges

• DE-CIX Frankfurt — Frankfurt, Germany
• AMS-IX Amsterdam — Amsterdam, Netherlands
• Vienna Internet Exchange — Vienna, Austria