AS16246 — AS16246 NEJ.cz s.r.o

AS16246 announces 13 IPv4 prefixes covering 133,120 addresses and 2 IPv6 prefixes.

About this network

The holder field starts with the AS number, the handle names a different company, and the hostnames name a third.

What it's used for

• A national provider's network. Fifteen prefixes announced from Czechia, two of them IPv6, one hundred and thirty-three thousand one hundred and twenty addresses, through fourteen observed BGP neighbours.

Notable

• The holder field begins with the two letters for an autonomous system and this network's own number, then the carrier's name. The field describes itself before it describes the company.
• The AS handle begins the same way and then names a smaller regional provider instead, with its own legal suffix.
• Eleven blocks share one netname scheme: a country code, an older network brand, and a full date, with dates spanning eleven years. Two more carry a country code and the regional provider's brand.
• Every block lists the same three contacts, the first of which is a bare four-digit number followed by the words for technical and administrative.
• Three of eighteen queried addresses answered, all the address with hyphens, the word for a client, and a fourth brand's domain.

Interesting

• Four names for one network is what happens when a national carrier absorbs a regional one that had already absorbed others. Each layer updated the field it cared about and left the rest.
• A numeric contact handle is a registry identifier that leaked into the human-readable part of the record. It is stable, unique, and tells a reader nothing at all about who answers.

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

Announced prefixes

• 77.87.232.0/21
• 78.108.152.0/21
• 82.150.160.0/19
• 86.63.192.0/19
• 91.197.116.0/22
• 92.240.160.0/19
• 94.74.192.0/18
• 95.143.128.0/20
• 176.98.96.0/20
• 178.17.96.0/20
• 185.15.252.0/22
• 188.175.0.0/16
• 213.180.32.0/19
• 2a02:350::/29
• 2a03:b4c0::/32

Upstream networks

• AS5610 O2 Czech Republic, a.s.

Downstream networks

• AS12570 O2 Czech Republic, a.s.
• AS41046 O2 Czech Republic, a.s.
• AS31246 O2 Czech Republic, a.s.
• AS29321 O2 Czech Republic, a.s.
• AS212315 Frantisek Toman
• AS44070 O2 Czech Republic, a.s.
• AS49767 O2 Czech Republic, a.s.
• AS202657 Pavel Jochim
• AS197197 CETIN a.s.
• AS62178 MASTER IT Technologies, a.s.
• AS207015 Position s.r.o.
• AS47681 O2 Czech Republic, a.s.
• AS39736 ICT Support, s.r.o.

Adjacent networks

• AS5610 O2 Czech Republic, a.s.
• AS12570 O2 Czech Republic, a.s.
• AS41046 O2 Czech Republic, a.s.
• AS31246 O2 Czech Republic, a.s.
• AS29321 O2 Czech Republic, a.s.
• AS212315 Frantisek Toman
• AS44070 O2 Czech Republic, a.s.
• AS49767 O2 Czech Republic, a.s.
• AS62178 MASTER IT Technologies, a.s.
• AS197197 CETIN a.s.
• AS202657 Pavel Jochim
• AS207015 Position s.r.o.
• AS47681 O2 Czech Republic, a.s.
• AS39736 ICT Support, s.r.o.

Internet exchanges

• Peering.cz — Prague, Czech Republic