AS15685 — CASABLANCA-AS Internet & Collocation Provider

Network type: hosting

AS15685 announces 57 IPv4 prefixes covering 31,232 addresses and 1 IPv6 prefixes.

About this network

The reverse DNS says which addresses are assigned and which are not.

What it's used for

• A provider and colocation operator. Fifty-seven IPv4 prefixes and one IPv6 prefix announced from Czechia, thirty-one thousand addresses, across twenty-eight observed BGP neighbours.

Notable

• Answering names begin with a word for the address's state: assigned- on some, unassigned- on others, alongside net-, bcast- and host- for the structural addresses of each subnet.
• Those names sit on four different domains, only one of which is the operator's own.
• The separators are inconsistent between them. Some write the four octets hyphenated, some keep the dots, and some pad the final octet to three digits.
• The AS handle continues past the abbreviation into a description of the business, spelling the word for shared rack space with a doubled letter.
• The netnames are a country code, the brand and an allocation date, with four different dates across the blocks, and every one lists a contact naming the registry itself.
• Eighteen addresses were queried and thirteen returned a name.

Interesting

• Publishing which addresses are unassigned is a free inventory of a network's spare capacity. It is generated automatically from the same records that produce the assigned names, and nobody decided to publish it so much as failed to decide not to.
• Fifty-seven routes for thirty-one thousand addresses is a network assembled from many small pieces over two decades, each announced as it arrived.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 77.78.76.0/24
• 77.78.95.0/24
• 77.78.96.0/20
• 77.78.118.0/23
• 77.78.123.0/24
• 77.78.124.0/22
• 81.0.192.0/22
• 81.0.199.0/24
• 81.0.206.0/23
• 81.0.208.0/23
• 81.0.212.0/23
• 81.0.214.0/24
• 81.0.217.0/24
• 81.0.225.0/24
• 81.0.226.0/24
• 81.0.228.0/24
• 81.0.231.0/24
• 81.0.232.0/21
• 81.0.240.0/23
• 81.0.250.0/24
• 81.0.254.0/23
• 82.208.6.0/23
• 82.208.8.0/22
• 82.208.12.0/24
• 82.208.14.0/24
• 82.208.16.0/23
• 82.208.18.0/24
• 82.208.27.0/24
• 82.208.28.0/23
• 82.208.34.0/23
• 82.208.39.0/24
• 82.208.40.0/23
• 82.208.44.0/24
• 82.208.46.0/23
• 82.208.48.0/23
• 82.208.50.0/24
• 82.208.56.0/24
• 82.208.58.0/24
• 85.239.227.0/24
• 85.239.252.0/24
• 109.123.192.0/21
• 109.123.202.0/23
• 109.123.205.0/24
• 109.123.210.0/23
• 109.123.214.0/23
• 109.123.216.0/21
• 185.95.118.0/23
• 217.11.224.0/23
• 217.11.227.0/24
• 217.11.228.0/23
• 217.11.230.0/24
• 217.11.235.0/24
• 217.11.236.0/24
• 217.11.242.0/24
• 217.11.248.0/23
• 217.11.251.0/24
• 217.11.254.0/24
• 2001:1528::/32

Upstream networks

• AS6939 Hurricane Electric LLC
• AS1299 Arelion Sweden AB
• AS29504 Freenet Liberec, z.s.
• AS33891 Core-Backbone GmbH
• AS24482 SG.GS
• AS42000 Futruy s.r.o.
• AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH

Downstream networks

• AS60592 Gransy s.r.o.
• AS203376 Mailkit s.r.o.
• AS198031 Trustica s.r.o.
• AS205300 Sunfox s.r.o.
• AS207153 Stream-iT, s.r.o.
• AS35236 UVT Internet s.r.o.
• AS6881 NIX.CZ z.s.p.o.
• AS48417 ITS akciova spolecnost

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS1299 Arelion Sweden AB
• AS60592 Gransy s.r.o.
• AS203376 Mailkit s.r.o.
• AS198031 Trustica s.r.o.
• AS29504 Freenet Liberec, z.s.
• AS33891 Core-Backbone GmbH
• AS24482 SG.GS
• AS205300 Sunfox s.r.o.
• AS207153 Stream-iT, s.r.o.
• AS35236 UVT Internet s.r.o.
• AS6881 NIX.CZ z.s.p.o.
• AS48417 ITS akciova spolecnost
• AS42000 Futruy s.r.o.
• AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
• AS57463 NetIX Communications JSC

Internet exchanges

• NIX.CZ - Neutral Internet eXchange for the Czech Republic — Prague, Czech Republic