AS15518 — CIRC-AS Schulze-Delitzsch-Str.36

AS15518 announces 6 IPv4 prefixes covering 7,936 addresses and 1 IPv6 prefixes.

About this network

Four naming schemes in one reverse zone, and one address answers on a customer's domain.

What it's used for

• An internet services company. Six IPv4 prefixes and one IPv6 /32 announced from Germany, nearly eight thousand addresses, through two observed BGP neighbours.

Notable

• Some names put the last octet first and the third octet second, joined by a dash.
• Others give the whole address in forward order with dots, inside a single label.
• One is not an address at all: a word for link, a subscriber line product code, and what reads as a site or customer name.
• One answers on an entirely different company's domain, and the rest sit under the operator's own.
• Netnames use two date formats, one with a two-digit year and one with four, so the two allocations were recorded under different conventions.
• Eighteen addresses were queried for reverse DNS and fourteen returned a name.

Interesting

• Four schemes in one zone is the record of four moments when somebody needed a name and wrote one. None of them is wrong; together they mean no tool can parse this zone reliably.
• The registrant roles are worth keeping: alongside the company, two role objects named for a network master and a guardian, which is more character than these fields usually carry.
• The AS handle continues into a street name and number with no space before the digits, postal information pushed into a network identifier.

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

Announced prefixes

• 212.86.160.0/20
• 212.86.180.0/22
• 212.86.188.0/22
• 213.153.64.0/23
• 213.153.67.0/24
• 213.153.72.0/22
• 2a00:1180::/32

Upstream networks

• AS5400 British Telecommunications Limited
• AS8220 COLT Technology Services Group Limited

Adjacent networks

• AS5400 British Telecommunications Limited
• AS8220 COLT Technology Services Group Limited