AS13135 — CREW-AS Hamburg, Germany
AS13135 announces 7 IPv4 prefixes covering 6,144 addresses and 19 IPv6 prefixes.
About this network
Eight sampled addresses, eight naming conventions, including an office number and a street.
What it's used for
- A German hosting and network company. 6,144 addresses across seven IPv4 prefixes, 20 IPv6 prefixes, and five observed BGP neighbours.
Notable
- Eight of 18 sampled addresses returned names, no two alike: LAN-212-12-50-0.irz42.net, BC-212.12.51.255.Office-Nr53.Humboldt.strasse.com, Host-254.temiz4u.net, HAM-Server-213-238-58.wizzad.de, 213.238.59.bc.akra.de, dhcp127.m-bit.net, SWDrucker.crew-gmbh.de and BC-192.76.134.127.crew-gmbh.de.
- Netnames include KTSLAN and KTS-LAN, the same name written two ways.
- The IPv6 announcements include a cascade of doubling prefixes from /47 up to /41.
Interesting
- One of those names encodes a room number and a street as DNS labels, so the reverse lookup returns a physical location. The hostname is doing the job of an asset register, publicly.
- Another names a printer. Anything with a reverse name here is reachable from the internet, and office hardware is the last thing that should be.
- BC- marks broadcast addresses, the ones that cannot belong to a host, named anyway by a generator that covered the whole range.
- Seven blocks and eight conventions means every customer configured their own zone and the provider never imposed a house style.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 45.66.89.0/24
- 185.132.220.0/22
- 192.76.124.0/24
- 192.76.134.0/24
- 194.55.156.0/24
- 212.12.48.0/21
- 213.238.56.0/21
- 2a00:14b0::/32
- 2a09:6640::/30
- 2a09:6644:2::/47
- 2a09:6644:4::/46
- 2a09:6644:8::/45
- 2a09:6644:10::/44
- 2a09:6644:20::/43
- 2a09:6644:40::/42
- 2a09:6644:80::/41
- 2a09:6644:100::/40
- 2a09:6644:200::/39
- 2a09:6644:400::/38
- 2a09:6644:800::/37
- 2a09:6644:1000::/36
- 2a09:6644:2000::/35
- 2a09:6644:4000::/34
- 2a09:6644:8000::/33
- 2a09:6645::/32
- 2a09:6646::/31
Upstream networks
- AS6939 Hurricane Electric LLC
- AS9211 Nawork Internet Informationssysteme GmbH
- AS3356 Level 3 Parent, LLC
Downstream networks
Adjacent networks
BGP / ASN / CIDR
awaiting query
enter an AS number, IP address, or organisation name above
IPv4
resolving...
IPv6
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Search Results
IPv4 Prefixes
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IPv6 Prefixes
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Total Prefixes
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Unique /24s
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⚠ SUSPICIOUS PREFIX ANNOUNCEMENTS DETECTED