AS31477 — DUOCAST-AS Duocast B.V.

Network type: hosting

AS31477 announces 29 IPv4 prefixes covering 30,720 addresses and 21 IPv6 prefixes.

About this network

DUOCAST-AS is operated by Duocast B.V.

What it's used for

• The address space carries hosting and business infrastructure, evidenced by netnames such as NL-CLOUD86-20190524 (Cloud86 B.V.), NL-AKSI-20161205 (AKSI Automatisering B.V.), and GRONNET (Provincie Groningen).
• The AS announces 30720 IPv4 addresses across 36 prefixes and 25 IPv6 prefixes, while maintaining 141 observed neighbours. This high neighbour-to-address ratio indicates a transit or peering-heavy role rather than a large-scale residential access network.

Notable

• Registrants are mixed, including Duocast B.V., Youwe Concept B.V., Cloud86 B.V., AKSI Automatisering B.V., and Provincie Groningen, suggesting the AS aggregates space for multiple entities or has acquired their holdings.
• The inventory includes a diverse range of prefixes, from large /20 blocks to smaller /24s, with some space registered to third parties like Cloud86 and AKSI.
• Reverse DNS samples show infrastructure hostnames like xe-0-0-1-107.er-r05.tcn.as31477.net, consistent with a hosting or data center environment.

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

Announced prefixes

• 37.9.160.0/21
• 45.82.188.0/22
• 82.150.139.0/24
• 83.137.144.0/21
• 87.238.168.0/21
• 89.188.0.0/19
• 89.200.200.0/21
• 91.196.104.0/22
• 91.198.178.0/24
• 91.206.136.0/23
• 91.209.192.0/24
• 91.213.95.0/24
• 91.220.82.0/24
• 93.184.96.0/20
• 185.80.245.0/24
• 185.80.246.0/24
• 185.134.65.0/24
• 185.180.96.0/22
• 193.9.23.0/24
• 193.138.248.0/22
• 193.164.144.0/24
• 193.177.163.0/24
• 193.200.178.0/24
• 193.202.109.0/24
• 194.13.8.0/22
• 194.13.12.0/23
• 194.13.14.0/24
• 195.137.165.0/24
• 195.137.169.0/24
• 2001:678:2b4::/48
• 2001:678:750::/48
• 2001:678:d0c::/48
• 2001:67c:6b8::/48
• 2a00:70c0::/48
• 2a01:1b0::/32
• 2a01:1b0:c010::/44
• 2a01:1b0:c020::/43
• 2a01:1b0:c040::/42
• 2a01:1b0:c080::/41
• 2a01:1b0:c100::/40
• 2a01:1b0:c200::/39
• 2a01:1b0:c400::/38
• 2a01:1b0:c800::/37
• 2a01:1b0:d000::/36
• 2a01:1b0:e000::/35
• 2a01:1b2::/32
• 2a07:3501:1020::/48
• 2a07:3505:80::/44
• 2a0b:6d80::/29
• 2a0e:7280::/29

Upstream networks

• AS1299 Arelion Sweden AB
• AS6939 Hurricane Electric LLC
• AS2914 NTT America, Inc.
• AS50673 Serverius Holding B.V.
• AS6830 Liberty Global Europe Holding B.V.
• AS37721 Virtual Technologies & Solutions
• AS24482 SG.GS
• AS213241 TECHIT.BE SRL
• AS48185 team.blue NV
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS17639 Converge ICT Solutions Inc.
• AS50300 CustodianDC Limited
• AS4657 StarHub Ltd
• AS20485 Joint Stock Company TransTeleCom
• AS204092 Association GRIFON
• AS6696 VERIXI SA
• AS33891 Core-Backbone GmbH
• AS37100 SEACOM Limited
• AS34927 iFog GmbH
• AS57866 Fusix Networks B.V.
• AS12552 GlobalConnect AB
• AS12779 IT.Gate S.p.A.
• AS4637 Telstra Global
• AS3320 Deutsche Telekom AG
• AS48362 Stadtwerke Feldkirch

Downstream networks

• AS8312 Bas Smit trading as Zylon
• AS39002 XINDI Networks SRL
• AS35974 Quality Technology Services, LLC
• AS198508 Plusine Systems B.V.
• AS204751 MobielWerkt B.V.
• AS51517 Arend Brouwer
• AS29028 DirectVPS B.V.
• AS51923 'Nothing But Air' Services B.V.
• AS213052 Bram Wittendorp trading as BittenBytes
• AS218916 Fiscale Inlichtingen en Opsporingsdienst (FIOD)
• AS198692 Eurofiber Cloud Infra B.V.
• AS398300 OCIENT INC
• AS201723 R. van der Meijden

Adjacent networks

• AS1299 Arelion Sweden AB
• AS6939 Hurricane Electric LLC
• AS2914 NTT America, Inc.
• AS8312 Bas Smit trading as Zylon
• AS6830 Liberty Global Europe Holding B.V.
• AS50673 Serverius Holding B.V.
• AS51923 'Nothing But Air' Services B.V.
• AS35974 Quality Technology Services, LLC
• AS39002 XINDI Networks SRL
• AS198508 Plusine Systems B.V.
• AS204751 MobielWerkt B.V.
• AS51517 Arend Brouwer
• AS29028 DirectVPS B.V.
• AS37721 Virtual Technologies & Solutions
• AS213241 TECHIT.BE SRL
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS50300 CustodianDC Limited
• AS48185 team.blue NV
• AS57866 Fusix Networks B.V.
• AS6696 VERIXI SA
• AS204092 Association GRIFON
• AS20485 Joint Stock Company TransTeleCom
• AS34927 iFog GmbH

Routing security

• RPKI: 40 valid, 0 invalid and 17 not-found announcements; 27 ROAs.
• ASPA: none published.
• IRR: 89% of announcements registered; 70 route objects.
• Listed in as-sets: AS-DDITS:AS-PEERS, AS-DOCLER:AS-PEERS, AS-FINECOM-PEERS-AMSIX, AS-GBLXEU, AS-GREEN-PEERS, AS-LIECOMTEL-PEERS, AS-MANDA-AMSIX-PEERS-V4, AS-MANDA-AMSIX-PEERS-V6, AS-NFORCE-NL-IX-PEERS, AS-TELECOM-PEERS, AS-XO-B, AS1136:AS-KPNNL, AS1200:AS-AMS-IX-PEERS, AS16243:AS-PEERS-AMSIX, AS20847:AS-PREVIDER-PEERS, AS20932:AS-PEERING, AS31477:AS-DUOCAST, AS34968:AS-AMS-IX-PEERS, AS39647:AS-PEERS-AMS-IX, AS39647:AS-PEERS-NL-IX, AS49820:AS-AMS-IX-PEERS, AS6777:AS-AMS-IX-RS, AS6777:AS-AMS-IX-RS-V6, AS680:AS-AMSIX-RS-PEERS, AS9150:AS-PEERS-AMSIX.

Internet exchanges

• AMS-IX Amsterdam — Amsterdam, Netherlands
• Neutral Internet Exchange — Amsterdam, Netherlands
• The Frys Internet Exchange — Frysian, Netherlands