Autonomous system
AS6744 RACTI-NET
Education ARIN
Summary
Computer Technology Institute and Press "Diophantus" (CTI)
education research legacy
RACTI-NET is the network of the Computer Technology Institute and Press "Diophantus" (CTI), a Greek research institute based on the University of Patras campus in Rio, near Patras.
What it's used for
- Research and administrative networking for CTI, whose registered address and network operations centre are both on the University of Patras campus.
- Reverse DNS across the announced space resolves under
cti.gr, including firewall and server hosts, so the addresses are used by the institute itself rather than resold.
What CTI does
- CTI is a public research and technology organisation supervised by the Greek Ministry of Education, working in informatics, ICT in education, and educational publishing.
- It is the technology arm behind Greece's school network and educational digital infrastructure, alongside its own computer science research.
Notable
- The address space is a single legacy
150.140.0.0/17, registered asCTINet. The registry record describes CTInet as the core of PATRASnet, providing that network's gateways to national and international connectivity, so this ASN is the gateway AS for academic networking in the Patras area rather than a purely internal institute LAN. - The AS handle still carries the older "RACTI" name (Research Academic Computer Technology Institute), a fossil of the institute's previous branding, while the organisation record uses the current "Diophantus" name.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS5408 | National Infrastructures for Research and Technology S.A. | 62 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-25, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 32.77K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GR | Greece | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS6744- Registry name
- RACTI-NET
- Registrant
- AS6744-MNT
- Abuse contact
- noc@cti.gr
- Registered
- 1970-01-01
- Last changed
- 2017-11-15
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 1 valid, 0 with no ROA
- ROAs
- 1 authorising AS6744
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS6744
Reputation
Classification and threat
Education University, school or national research and education network.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 443 networks and 1,779 prefixes, as published 2026-10-24. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere