subnet.im

AS8248Computer Technology Institute and Press "Diophantus"

GreeceRegistryRIPE NCC

As of 24th October 2026, AS8248 (Computer Technology Institute and Press…), a network registered in Greece with RIPE NCC, originates 10 IPv4 prefixes covering 79.6k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 2,789th-largest of the 79,664 networks we see originating IPv4, and the 7th-largest of 226 in Greece. It is seen behind 1 upstream network, most often AS5408 (National Infrastructures for Research…). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 69% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

10

IPv6 prefixes

3

IPv4 addresses

79.6k

IPv6 /64s

17M

Upstream graph

The networks AS8248 is seen behind, one and two hops out, drawn from real AS paths.

AS8248Toward the internet core
Upstream graph for AS8248: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS8248Computer Technolo…This networkAS5408National Infrastr…AS3491PCCW Global (HK) …AS21320GEANT Vereniging

Networks observed one and two hops upstream of AS8248 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS8248
NetworkCountryRelationshipPathsVantage pts
AS5408National Infrastructures for Research and Technology S.A.GRPeer651139

Prefixes

The largest blocks AS8248 originates, widest first.

Largest prefixes originated by AS8248
PrefixAddressesVisibility
81.186.0.0/1732.8k76/76
81.186.128.0/1816.4k76/76
81.186.192.0/198.2k76/76
194.63.160.0/198.2k76/76
194.63.192.0/198.2k76/76
194.63.224.0/204.1k76/76
194.63.236.0/221k2/76
81.186.75.0/242562/76
81.186.76.0/242562/76
194.63.235.0/242562/76

Routing health

How AS8248's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid100.0%13
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more69.2%9
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%30.8%4

Prefix sizes

IPv4 — 10 prefixes

IPv6 — 3 prefixes

  • /4016.8M × /6433.3%1
  • /47131k × /6433.3%1
  • /4865.5k × /6433.3%1

Recent changes

Announcements that started or stopped since 24th Sept 2026.

No announcement by AS8248 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.