AS15580 — Gutenbergstrasse 8

AS15580 announces 20 IPv4 prefixes covering 9,472 addresses and 1 IPv6 prefixes.

About this network

The AS handle is a street address, building number included.

What it's used for

• An insurance group's technology arm. Twenty IPv4 prefixes and one IPv6 /32 announced from Germany, nine thousand addresses, across twenty-eight observed BGP neighbours.

Notable

• The AS handle holds a street name and a house number instead of an organisation code, so the field that identifies the network identifies a building.
• Sixteen of the twenty blocks come out of one large range and are announced as separate /22, /23 and /24 routes rather than as one piece.
• Blocks are registered to five different companies in the group, in four countries, but one network team is listed as contact on nearly all of them.
• Two netnames name insurance brands that are not the holder's, and one is an opaque eight-character string with a digit on the end.
• Eighteen addresses were queried for reverse DNS and none returned a name.

Interesting

• Announcing sixteen pieces of one range instead of the range itself costs everyone downstream sixteen routing entries where one would do, and gains control over how traffic to each piece arrives.
• A group's corporate structure is fully readable here: the brands it bought, the countries they sit in, and the single team that runs the network for all of them.
• Not one address answers in reverse, which for nine thousand addresses of corporate space is a consistent choice rather than an oversight.

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

Announced prefixes

• 193.29.52.0/24
• 193.58.222.0/23
• 193.108.175.0/24
• 194.34.174.0/24
• 194.127.1.0/24
• 194.127.2.0/23
• 194.127.5.0/24
• 194.127.9.0/24
• 194.127.11.0/24
• 194.127.12.0/22
• 194.127.16.0/24
• 194.127.19.0/24
• 194.127.20.0/24
• 194.127.22.0/23
• 194.127.24.0/22
• 194.127.28.0/23
• 194.127.32.0/22
• 194.127.64.0/22
• 194.127.76.0/24
• 194.127.88.0/23
• 2a01:6f8::/32

Upstream networks

• AS32787 Akamai Technologies, Inc.
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS8220 COLT Technology Services Group Limited
• AS6939 Hurricane Electric LLC
• AS15557 SFR SA
• AS24482 SG.GS
• AS6696 VERIXI SA
• AS57463 NetIX Communications JSC

Downstream networks

• AS203584 Allianz Technology SE

Adjacent networks

• AS32787 Akamai Technologies, Inc.
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS203584 Allianz Technology SE
• AS8220 COLT Technology Services Group Limited
• AS6939 Hurricane Electric LLC
• AS15557 SFR SA
• AS24482 SG.GS
• AS6696 VERIXI SA
• AS57463 NetIX Communications JSC

Internet exchanges

• DE-CIX Frankfurt — Frankfurt, Germany
• Equinix Internet Exchange Paris — Paris, France