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Network report

Who holds an IP address, prefix or AS number, how it is routed (origin AS, RPKI, IRR), its reverse DNS, blocklist listings and PeeringDB record, with what to fix first.

IP address, prefix or AS number

AS8399 · 

curl -s "https://thenetworkery.com/api/v1/network-report?query=AS8399"
JSON Docs

Warning: AS8399 (SEWAN-FR SEWAN SAS) announces 32 IPv4 and 4 IPv6 prefixes. 1 warning

AS pageAS8399
HolderSEWAN-FR SEWAN SAS
AllocationRIPE NCC, France (FR), allocated 1997-07-29
Prefixes (IPv4 / IPv6)32 / 4
RPKI valid86% (31 / 36)
Upstreams and peers74
Peering policyOpen

What to fix

  1. Warning

    5 of 36 announced prefixes have no ROA (RPKI not found): 185.50.52.0/24, 185.50.53.0/24, 185.50.54.0/24, 185.50.55.0/24, 193.142.158.0/24.

    Without a ROA, networks cannot tell your routes from a hijack.

    Fix: Create a ROA for each at your RIR portal, with origin AS8399 and a max length equal to the prefix length:

    185.50.52.0/24 AS8399 max-length /24
185.50.53.0/24 AS8399 max-length /24
185.50.54.0/24 AS8399 max-length /24
185.50.55.0/24 AS8399 max-length /24
193.142.158.0/24 AS8399 max-length /24

    Open in RPKI / ROA validator Guide

Checks

Routing and RPKI 5 of 36 announced prefixes have no ROA (RPKI not found): 185.50.52.0/24, 185.50.53.0/24, 185.50.54.0/24, 185.50.55.0/24, 193.142.158.0/24.
  • Pass: AS8399 announces 32 IPv4 and 4 IPv6 prefixes.
  • Warning: 5 of 36 announced prefixes have no ROA (RPKI not found): 185.50.52.0/24, 185.50.53.0/24, 185.50.54.0/24, 185.50.55.0/24, 193.142.158.0/24.
  • Info: 31 of 36 announced prefixes are RPKI valid.
  • Pass: Every announced prefix has an IRR route object.
  • Info: 74 upstreams and peers, 0 downstream networks seen.
HolderSEWAN-FR SEWAN SAS
IPv4 prefixes32
IPv6 prefixes4
RPKI31 valid · 5 not found
Downstream networks0
Routes to fix
PrefixRPKI
185.50.52.0/24 No ROA
185.50.53.0/24 No ROA
185.50.54.0/24 No ROA
185.50.55.0/24 No ROA
193.142.158.0/24 No ROA

Upstreams and peers seen to the left 74

AS35699 Adamo Telecom Iberia S.A AS1299 Arelion (Twelve99) AS3257 GTT AS6939 Hurricane Electric AS174 Cogent Communications, Inc. AS2914 NTT Global IP Network AS6461 Zayo AS33891 Core-Backbone AS12479 Orange Spain AS25091 IP-Max SA AS50263 1-IX EU AS34549 meerfarbig GmbH & Co. KG

Announced prefixes 36

37.97.64.0/19 37.97.96.0/20 37.139.120.0/21 65.39.64.0/19 80.251.96.0/20 81.93.0.0/19 88.213.224.0/19 155.2.128.0/19 157.143.128.0/17 178.174.96.0/20 178.255.160.0/21 185.6.92.0/22 185.8.252.0/22 185.24.140.0/22 185.32.208.0/22 185.42.176.0/22 185.50.52.0/24 185.50.53.0/24 185.50.54.0/24 185.50.55.0/24 185.65.248.0/22 185.76.216.0/22 185.218.208.0/22 185.249.20.0/22 193.142.158.0/24 195.135.0.0/17 195.135.0.0/18 195.135.12.0/23 195.135.48.0/20 195.135.48.0/24 217.74.96.0/20 217.181.128.0/17 2a0b:e3c0::/29 2a02:6e8::/32 2a02:c440::/29 2a05:5cc0::/29

Source: RIPEstat (RIPE NCC RIS, Routinator, IRR); AS names: Team Cymru

Open in ASN & BGP prefix lookup
Registration Found at rdap.db.ripe.net.
  • Pass: Found at rdap.db.ripe.net.
NameSEWAN-FR
HandleAS8399
RangeAS8399
Statusactive
Registered2002-09-24T12:13:36Z
Last changed2017-11-15T09:15:59Z
Abuse contactabuse@sewan.fr
Allocation
Registry (RIR)RIPE NCC
CountryFrance (FR)
Delegated on1997-07-29
StatusAllocated
Delegated rangeAS8399

Source: RIR delegation data, updated daily. The country is where the range was registered, not necessarily where it is used.

Contacts
RoleNameEmail
registrant MNT-SEWAN
registrant SEWAN SAS
registrant ORNIS-MNT
registrant RIPE-NCC-END-MNT
abuse NOC AS8399 abuse@sewan.fr

Source: https://rdap.db.ripe.net/autnum/8399. Registration data from rdap.db.ripe.net, shown under its terms of use (terms): not for marketing or bulk collection. Personal contacts in this registry are not shown.

Open in WHOIS / RDAP lookup
PeeringDB AS8399 is in PeeringDB as Sewan SAS.
  • Pass: AS8399 is in PeeringDB as Sewan SAS.
  • Info: Peering policy: Open.
  • Info: Present at 11 internet exchanges with 13 ports (577G in total).
NetworkSewan SAS
AS numberAS8399
TypeCable/DSL/ISP, Europe
Websitehttps://www.sewan.eu/
IRR as-setRIPE::AS-SEWAN
Prefixes (IPv4 / IPv6)100 / 10
Traffic200-300Gbps, Mostly Inbound
Peering policyOpen
LocationsPreferred
Ratio requiredNo
ContractsNot Required
Last updated2026-11-03
Contacts
Policypeering@sewan.fr
Abuseabuse@sewan.fr
NOCsupport.client@sewan.fr

Source: PeeringDB. Results are cached for an hour.

Open in PeeringDB lookup