AS12557 — SIMPLETHINGS

AS12557 announces 2 IPv4 prefixes covering 768 addresses and 13 IPv6 prefixes.

About this network

23 IPv6 prefixes against 768 IPv4 addresses, and a reverse zone that publishes which addresses are free.

What it's used for

• Hosting and application infrastructure. 768 IPv4 addresses in two prefixes, 23 announced IPv6 prefixes, and two observed BGP neighbours.

Notable

• The IPv6 announcements step through 2a03:52a0::/40, then /42, /43, /44, /47, two /48s, /46, /45 and /47, each picking up where the last left off.
• Laid end to end they run contiguously from 2a03:52a0:: onward without a gap.
• The IPv4 blocks are 185.117.180.0/23, netname DE-SIMPLETHINGS-20150917, and 185.117.182.0/24, netname SimpleThingsExternal — mixed case with an underscore.
• Two addresses answer freeip64.simplethings.de and red-ip127.simplethings.de.

Interesting

• freeip64 is an inventory note that escaped into public DNS. Somebody kept track of which addresses were spare by naming them so, which works perfectly until the reverse zone is visible to everyone — and reverse zones always are.
• red-ip127 alongside it suggests a colour scheme for classifying addresses, and colour schemes in infrastructure almost always encode trust: which side of a firewall a thing sits on. The names are doing the job a spreadsheet would elsewhere.
• Twenty-three IPv6 prefixes for a network with 768 IPv4 addresses is the third example of this artefact in the range, after AS12491 and AS12517. A contiguous IPv6 range emitted as a staircase of doubling blocks is common enough here to be a tool's signature rather than anyone's decision.

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

Announced prefixes

• 185.117.180.0/23
• 185.117.182.0/24
• 2a03:52a0::/39
• 2a03:52a0:184::/46
• 2a03:52a0:188::/45
• 2a03:52a0:190::/44
• 2a03:52a0:1a0::/43
• 2a03:52a0:1c0::/42
• 2a03:52a0:200::/39
• 2a03:52a0:400::/38
• 2a03:52a0:800::/37
• 2a03:52a0:1000::/36
• 2a03:52a0:2000::/35
• 2a03:52a0:4000::/34
• 2a03:52a0:8000::/33

Upstream networks

• AS3209 Vodafone GmbH
• AS16276 OVH SAS

Adjacent networks

• AS3209 Vodafone GmbH
• AS16276 OVH SAS