Home ASN LookupAS513

AS513 CERN CERN - European Organization for Nuclear Research

🇨🇭

Org handle: ORG-CEOf1-RIPE

RIPE NCCallocated

Announced Prefixes (BGP)

38total

25 IPv413 IPv6

IPv4 Addresses

Allocated (RIR)354,816

Announced (BGP)485,888

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)1.5×10²⁹

Prefix Limit (IPv4)

500

Prefix Limit (IPv6)

Country

🇨🇭 CH

RIR

RIPE NCC

Status

allocated

Allocated

1992-11-17

Routing hygiene

Score 24/100 · Low risk

RPKI ROA coverage

57.9%

16 prefixes RPKI invalid

IRR route objects

100%

no origin mismatches

Hijack signals

0 announced against others' ROAs, 0 own announced by others

Upstreams

diversity 38/100

42% of announced prefixes (16 of 38) have no valid ROA, 16 of them RPKI invalid

Based on 38 announced prefixes, updated daily (2026-10-24). How the score works · RPKI explained

Announced Prefixes

(BGP)38

Prefix	RPKI	IRR	Last Seen
128.141.0.0/16	Valid	RIPE	2026-10-26
128.142.0.0/16	Valid	RIPE	2026-10-26
137.138.0.0/16	Valid	RIPE	2026-10-26
185.249.56.0/22	Valid	RIPE	2026-10-26
188.184.0.0/16	Valid	RIPE	2026-10-26
188.184.0.0/17	Invalid	-	2026-10-26
188.184.128.0/17	Invalid	-	2026-10-26
188.185.0.0/16	Valid	RIPE	2026-10-26
188.185.0.0/17	Invalid	-	2026-10-26
188.185.128.0/18	Invalid	-	2026-10-26

1-10 of 38

1 / 4

Allocated Prefixes

(RIR)20

Prefix	Country	RIR	Status
128.141.0.0/16	🇨🇭 CH	RIPENCC	assigned
128.142.0.0/16	🇨🇭 CH	RIPENCC	assigned
137.138.0.0/16	🇨🇭 CH	RIPENCC	assigned
185.249.56.0/22	🇨🇭 CH	RIPENCC	allocated
188.184.0.0/16	🇨🇭 CH	RIPE	assigned
188.185.0.0/16	🇨🇭 CH	RIPE	assigned
192.16.155.0/24	🇨🇭 CH	RIPENCC	assigned
192.16.156.0/22	🇨🇭 CH	RIPENCC	assigned
192.16.160.0/22	🇨🇭 CH	RIPENCC	assigned
192.16.164.0/23	🇨🇭 CH	RIPENCC	assigned

1-10 of 20

1 / 2

All 38 announced prefixes of AS513 →

Downstream Customers(1)

ASN	Name
AS559	🇨🇭Switch SWITCH

BGP Neighbours

(seen in AS paths)

Upstreams (3)

Networks AS513 hands its own prefixes to: transit providers, or peers at an exchange.

AS25091IP Max IP Max20
AS20965GEANT Vereniging5
AS174Cogent Communications1

Downstreams (9)

Networks whose own prefixes AS513 passes on: usually its customers.

AS2200Renater276
AS12654RIPE NCC RIS Reseaux IP Europeens Network Coordination Centre (RIPE NCC)7
AS21449ETATGE Etat De Geneve4
AS20940AKAMAI ASN1 Akamai International B.V2
AS28810WHO World Health Organization (WHO)2
AS11537Internet21
AS17579KISTI1
AS25152K ROOT SERVER Reseaux IP Europeens Network Coordination Centre (RIPE NCC)1
AS48751UNOG United Nations Logistics Base1

Other adjacent networks (6)

Adjacent to AS513 in the transit part of AS paths: peers, providers or customers.

AS293ESnet15
AS9885NKN INTERNET GATEWAY NETWORK6
AS10764University Of Illinois5
AS29222Infomaniak Network5
AS22335Metropolitan Research And Education Network2
AS21320GEANT IAS VRF GEANT Vereniging1

ASPA

No ASPA0 upstreams, 1 downstream

Listed as Upstream Provider by

1 ASN

View full ASPA details →

Abuse Contact

+31205354444

External Links

RIPE Whois RIPEstat

Learn more

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
How to run an ASPA checkVerify the upstream providers listed above
IPv4 transfers in the RIPE NCC regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Open

GEThttps://api.ipctl.io/v1/asn/513

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/513" | jq