Autonomous system
AS15744 SILWEB-AS-COM SILWEB Autonomous System - Commercial
Hosting RIPE Network Services
Summary
Silesian University of Technology, Computer Centre
education research business
Netname dates from before and after the year format changed, side by side in one holding.
What it's used for
- A university computer centre's network. Fifteen IPv4 prefixes and one IPv6 prefix announced from Poland, twenty thousand addresses, across fifteen observed BGP neighbours.
Notable
- Two netname dates are six digits with a two-digit year, filed a little over a year apart. Two more are eight digits with a full year. All four share the same country code and centre abbreviation.
- The six-digit pair is the oldest allocation visible in this stretch of numbers apart from one, and the changeover to the longer form is legible inside a single holder's records.
- The AS handle carries an abbreviation, then the brand again, then the words for an autonomous system spelled out in full.
- One block belongs to a mining research institute rather than the university, under a three-letter netname of its own.
- The blocks come from four unrelated ranges, announced in pieces from a
/20down to a/24. - Eighteen addresses were queried for reverse DNS and none returned a name.
Interesting
- The two-digit year is a dating method that survives the record it sits in. Anything with the short form was filed before the changeover, whatever else the entry claims about itself.
- Fifteen neighbours for a university centre is a research network with many peers rather than a customer network with a few upstreams, and the mining institute's block explains part of it.
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
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| TPIX - Internet Exchange | Warsaw, Poland | 195.149.233.12 |
Transit providers
6 upstream, 7 downstream and 21 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS13293 | Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center | 181 |
| AS196844 | Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center | 179 |
| AS6939 | Hurricane Electric LLC | 14 |
| AS3303 | Swisscom (Schweiz) AG | 13 |
| AS24482 | SG.GS | 1 |
| AS201054 | Stowarzyszenie e-Poludnie | 1 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 15 prefixes · 20.22K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PL | Poland | 16 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS15744- Registry name
- SILWEB-AS-COM
- Registrant
- Silesian University of Technology, Computer Centre
- Abuse contact
- abuse@silweb.pl
- Registered
- 1970-01-01
- Last changed
- 2019-12-04
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- SASK-COM
- Network type
- Network Services
- Scope
- Not Disclosed
- Traffic ratio
- Not Disclosed
- Peering policy
- Selective
- IRR as-set
AS15744:AS-SASK-COM- Present at
- 2 exchanges
- Facilities
- 3 facilities
- Website
- https://www.polsl.pl/rju1-ck/sask/
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 7 valid, 0 with no ROA
- ROAs
- 7 authorising AS15744
- ASPA
- no ASPA record
- IRR
- 100% registered · 7 of 7 announcements
- Route objects
- 9 naming AS15744
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
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: 431 networks and 1,775 prefixes, as published 2026-10-11. 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