AS15744 — SILWEB-AS-COM SILWEB Autonomous System - Commercial

Network type: hosting

AS15744 announces 15 IPv4 prefixes covering 20,224 addresses and 1 IPv6 prefixes.

About this network

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 /20 down 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.

Announced prefixes

• 83.230.52.0/22
• 83.230.56.0/21
• 83.230.80.0/21
• 83.230.88.0/22
• 83.230.92.0/23
• 83.230.95.0/24
• 195.82.174.0/23
• 195.82.184.0/22
• 212.106.128.0/21
• 212.106.136.0/23
• 212.106.140.0/22
• 212.106.144.0/20
• 212.106.168.0/21
• 213.227.64.0/22
• 213.227.76.0/22
• 2a01:1df::/32

Upstream networks

• AS13293 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS196844 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS6939 Hurricane Electric LLC
• AS3303 Swisscom (Schweiz) AG
• AS201054 Stowarzyszenie e-Poludnie
• AS24482 SG.GS

Downstream networks

• AS50231 Miconet Sp. z o.o.
• AS13000 Leon Sp. z o.o.
• AS35434 PirxNet Grzegorz Bialas
• AS201977 Miasto Zabrze
• AS8508 Silesian University of Technology, Computer Centre
• AS199279 Silesian University of Technology, Computer Centre
• AS34969 Jacek Dudek trading as "Prestiz"

Adjacent networks

• AS196844 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS13293 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS50231 Miconet Sp. z o.o.
• AS13000 Leon Sp. z o.o.
• AS35434 PirxNet Grzegorz Bialas
• AS201977 Miasto Zabrze
• AS3303 Swisscom (Schweiz) AG
• AS8508 Silesian University of Technology, Computer Centre
• AS199279 Silesian University of Technology, Computer Centre
• AS34969 Jacek Dudek trading as "Prestiz"
• AS201053 Stowarzyszenie e-Poludnie
• AS6939 Hurricane Electric LLC
• AS201054 Stowarzyszenie e-Poludnie
• AS24482 SG.GS

Internet exchanges

• TPIX - Internet Exchange — Warsaw, Poland