HomeASN LookupAS21320

AS21320 GEANT_IAS_VRF GEANT Vereniging

🇳🇱

Org handle: ORG-DLCU1-RIPE

RIPE NCCallocatedASPA Published
Announced Prefixes (BGP)
3total
1 IPv42 IPv6
IPv4 Addresses
Allocated (RIR)2,048
Announced (BGP)2,048
IPv6 Addresses
Allocated (RIR)0
Announced (BGP)7.9×10²⁸
Prefix Limit (IPv4)
10
Prefix Limit (IPv6)
10
Country
🇳🇱 NL
RIR
RIPE NCC
Status
allocated
Allocated
2001-10-31

Routing hygiene

Score 38/100 · Medium risk
RPKI ROA coverage
33.3%
2 prefixes RPKI invalid
IRR route objects
33.3%
2 prefixes registered for another origin
Hijack signals
0
0 announced against others' ROAs, 0 own announced by others
Upstreams
3
diversity 67/100
  • 67% of announced prefixes (2 of 3) have no valid ROA, 2 of them RPKI invalid
  • 67% of announced prefixes (2 of 3) have no IRR route object for this ASN

Based on 3 announced prefixes, updated daily (2026-10-23). How the score works · RPKI explained

Announced Prefixes

(BGP)3
|
Prefix
RPKI
IRR
Last Seen
83.97.88.0/21
 Valid
RIPE
2026-10-24
2001:798:1::/48
 Invalid-2026-10-24
2001:799::/32MOAS
 Invalid-2026-10-24

Allocated Prefixes

(RIR)1
Prefix
Country
RIR
Status
83.97.88.0/21🇳🇱 NLRIPENCCassigned

All 3 announced prefixes of AS21320 →

Upstream Providers(3)

ASNName
AS174🇺🇸COGENT-174 - Cogent Communications, LLC
AS2603🇩🇰NORDUNET NORDUnet
AS3356🇺🇸LEVEL3 - Level 3 Parent, LLC

Downstream Customers(6)

ASNName
AS559🇨🇭Switch SWITCH
AS680🇩🇪DFN Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.
AS1213🇮🇪Asiera ASIERA TECHNOLOGY SERVICES CLG
AS2602🇱🇺RESTENA Fondation RESTENA
AS2852🇨🇿CESNET2 CESNET z.s.p.o.
AS5408🇬🇷GR-NET National Infrastructures for Research and Technology S.A.

BGP Neighbours

(seen in AS paths)

Upstreams (3)

Networks AS21320 hands its own prefixes to: transit providers, or peers at an exchange.

Downstreams (32)

Networks whose own prefixes AS21320 passes on: usually its customers.

  • AS1930RCCN Fundacao Para A Ciencia E A Tecnologia, I.P79
  • AS2614RoEduNet Agentia De Administrare A Retelei Nationale De Informatica Pentru Educatie Si Cercetare48
  • AS378MACHBA IUCC Israel InterUniversity Computation Center36
  • AS2200Renater27
  • AS5408GR NET National Infrastructures For Research And Technology S.A26
  • AS2607SANET Zdruzenie Pouzivatelov Slovenskej Akademickej Datovej Siete SANET21
  • AS61211SETCOR D.O.O10
  • AS2107ARNES NET ARNES9
  • AS9199RENAM Public Association7
  • AS12046ASN CSC UOM University Of Malta7
  • AS2611BELNET5
  • AS13092UB Akademska Mreza Republike Srbije AMRES5
  • AS47623IIAP ASNET Institute For Informatics And Automation Problems5
  • AS1955HBONE KIFU (Governmental Info Tech Development Agency)4
  • AS3268University Of Cyprus4
  • AS20965GEANT Vereniging3
  • AS137ASGARR Consortium GARR2
  • AS2108CARNet Croatian Academic And Research Network2
  • AS3221EENet Haridus Ja Teadusministeerium2
  • AS44224MARnet Macedonian Academic Research Network Skopje2
  • AS199354ASREN Arab States Research And Education Network (ASREN) Gemeinnutzige2
  • AS766RedIRIS Entidad Publica Empresarial Red.Es1
  • AS2602RESTENA Fondation RESTENA1
  • AS3208Algerian Academic Research Network Algerian Academic Research Network1
  • AS5538SigmaNet NIC Institute Of Mathematics And Computer Science Of University Of Latvia1
  • AS6802UNICOM B Bulgarian Research And Education Network Association (BREN)1
  • AS12687URAN User Association Of Ukrainian Research And Academic Network URAN1
  • AS25369BANDWIDTH Hydra Communications1
  • AS31898Oracle Corporation1
  • AS136968SingAREN1
  • AS200999Pl Cloudferro S.A1
  • AS202012GEANT Office GEANT Vereniging1

Other adjacent networks (13)

Adjacent to AS21320 in the transit part of AS paths: peers, providers or customers.

  • AS33891CORE BACKBONE Core Backbone273
  • AS3356Level 3 Parent124
  • AS8501PIONIER Institute Of Bioorganic Chemistry Polish Academy Of Science, Poznan Supercomputing And Networking Center15
  • AS6461Zayo Bandwidth12
  • AS9002RETN Limited3
  • AS3216SOVAM PJSC "Vimpelcom"2
  • AS1828Unitas Global1
  • AS3303SWISSCOM (Schweiz)1
  • AS4134No.31,Jin Rong Street1
  • AS8218NEO ASN Zayo Infrastructure France1
  • AS8517ULAKNET National Academic Network And Information Center1
  • AS20473The Constant Company1
  • AS49544I3Dnet I3D.Net B.V1

Transfer History

Registry transfers of AS21320 between organisations.

1
ASPA
Published3 upstreams, 6 downstreams
Authorized Upstream Providers
AS174AS2603AS3356
Expires 2026-10-27
Listed as Upstream Provider by
6 ASNs
View full ASPA details →
Abuse Contact
External Links
RIPE WhoisRIPEstat

Learn more

API
Open
GEThttps://api.ipctl.io/v1/asn/21320

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

curl -s "https://api.ipctl.io/v1/asn/21320" | jq