AS5408 National Infrastructures for Research and Technology S.A. 🇬🇷 GR

Announcing 40 prefixes, seen at the RIS collectors.

IPv4 prefixes

251,904 (984 × /24)

IPv6 prefixes

8 × /32

Upstreams

transit providers observed

Peers

settlement-free adjacencies

Downstreams

transit customers observed

Customer cone

ASes reachable through it

Registry and operator data

AS number: AS5408
Name: National Infrastructures for Research and Technology S.A.
Organisation: National Infrastructures for Research and Technology (GRNET)
Country: 🇬🇷 GR
RIR: RIPENCC
Allocated: 1995-09-06
Network type: Educational/Research
Traffic levels: 20-50Gbps
Scope: Regional
Peering policy: Open
IRR as-set: RIPE::AS-GRNET
Website: http://www.grnet.gr
Looking glass: http://mon.grnet.gr/lg
PeeringDB: net/2025
Exchanges: 2
Facilities: 3

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

34 valid (85.0%) 0 invalid (0.0%) 6 no ROA (15.0%)

Upstreams

Networks seen providing transit to this one

Network	Country	Cone	IPv4 prefixes	Paths	Source
AS3491 PCCW Global (HK) Ltd.	🇭🇰 HK	52,882	527	221	CAIDA
AS21320 GEANT Vereniging	🇳🇱 NL	39,085	1	5,007	CAIDA
AS20965 GEANT Vereniging	🇳🇱 NL	39,080	2	158	CAIDA
AS13335 Cloudflare, Inc.	🇺🇸 US	38,265	2,709	180	CAIDA

Peers

Adjacencies that look settlement-free rather than transit

Network	Country	Cone	IPv4 prefixes	Paths	Source
AS8280 SYNAPSECOM S.A. Provider of Telecommunications and Internet Services	🇬🇷 GR	38,281	66	139	CAIDA

Downstreams

Networks this one appears to provide transit to

Network	Country	Cone	IPv4 prefixes	Paths	Source
AS8522 Foundation of Research and Technology Hellas	🇬🇷 GR	7	4	181	CAIDA
AS47065 USC / UFMG PEERING Research Testbed	🇺🇸 US	2	12	136	CAIDA
AS8248 Computer Technology Institute and Press "Diophantus"	🇬🇷 GR	0	10	369	CAIDA
AS8581 University Of Ioannina	🇬🇷 GR	0	7	334	CAIDA
AS8762 Hellenic Mediterranean University	🇬🇷 GR	0	7	327	CAIDA
AS12402 University of Piraeus	🇬🇷 GR	0	4	205	CAIDA
AS15690 NATIONAL OBSERVATORY OF ATHENS	🇬🇷 GR	0	4	201	CAIDA
AS8643 NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS	🇬🇷 GR	0	4	201	CAIDA
AS31563 Hellenic National Meteorological Service	🇬🇷 GR	0	3	190	CAIDA
AS8991 Hellenic Centre for Marine Research	🇬🇷 GR	0	4	171	CAIDA
AS8618 Ionion University	🇬🇷 GR	0	4	168	CAIDA
AS8617 University of the Aegean	🇬🇷 GR	0	4	168	CAIDA
AS9069 UNIWA	🇬🇷 GR	0	3	162	CAIDA
AS8253 Democritus University of Thrace	🇬🇷 GR	0	3	159	CAIDA
AS8611 Athens University of Economics and Business	🇬🇷 GR	0	3	129	CAIDA
AS5489 International Hellenic University	🇬🇷 GR	0	3	126	CAIDA
AS15948 ICE/HT fundamental and technological research	🇬🇷 GR	0	3	126	CAIDA
AS12364 University of Macedonia, Economic and Social Sciences	🇬🇷 GR	0	2	119	CAIDA
AS6867 University of Crete	🇬🇷 GR	0	2	117	CAIDA
AS5470 Aristotle University of Thessaloniki	🇬🇷 GR	0	2	117	CAIDA
AS20813 Hellenic Open University	🇬🇷 GR	0	2	84	CAIDA
AS50148 Elliniki Radiofonia Tileorasi (ERT) SA	🇬🇷 GR	0	6	82	CAIDA
AS202640 KENTRO POLITISMOU IDRYMA STAVROS NIARCHOS MONOPROSOPI A.E.	🇬🇷 GR	0	1	77	CAIDA
AS2546 National Center of Scientific Research DEMOKRITOS	🇬🇷 GR	0	1	76	CAIDA
AS3323 National Technical University of Athens	🇬🇷 GR	0	1	76	CAIDA
AS8278 Technical University of Crete	🇬🇷 GR	0	1	76	CAIDA
AS47616 Center for Research and Technology Hellas (CERTH)	🇬🇷 GR	0	1	76	CAIDA
AS203348 Hellenic Telecommunications and Post Commision	🇬🇷 GR	0	2	53	CAIDA
AS6744 Computer Technology Institute and Press "Diophantus"	🇬🇷 GR	0	1	42	CAIDA
AS15536 European Centre for the Development of Vocational Training (CEDEFOP)	🇬🇷 GR	0	1	36	CAIDA

Relationships marked inferred come from where the two networks sit on the AS paths the collectors see, which is a guess and is wrong for some of them. The rest are stated by CAIDA's published inference over a much wider set of collectors.