AS14014 — CNRAIL-AS

AS14014 announces 2 IPv4 prefixes covering 66,560 addresses and 1 IPv6 prefixes.

About this network

One sixteen-bit block shredded into more than twenty announcements, every one of them filed under a two-letter netname.

What it's used for

• A freight railway's corporate network. 66,560 addresses across 27 IPv4 prefixes plus one IPv6 prefix, 2620:196::/32, with four observed BGP neighbours.

Notable

• Every registry record checked carries the netname CN, registered to Canadian National Railway Co.
• Almost every prefix sits inside 165.115, announced in pieces from /19 down to /23.
• One block, 208.67.168.0/22, falls outside that range.
• Eighteen addresses were queried for reverse DNS and none returned a name.

Interesting

• CN is two characters, and it is both the company's initials and the mark painted on the side of its locomotives. Netnames are usually padded with the block, the site or a ticket number; this one assumes anybody reading already knows.
• Splitting a sixteen-bit range into more than twenty separate announcements is what a network looks like when it follows track rather than buildings. The pieces go up at different points on a line that crosses a continent, and each has to be reachable from wherever the fibre reaches it.
• The IPv6 allocation is a single /32 against 27 IPv4 pieces. One was requested once and has never needed subdividing; the other accumulated.
• Nothing answers a reverse lookup. A railway's network exists to move dispatch and telemetry, not to be reached from outside.

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

Announced prefixes

• 165.115.0.0/16
• 208.67.168.0/22
• 2620:196::/32

Upstream networks

• AS6461 Zayo Bandwidth
• AS3257 GTT Communications Inc.
• AS6939 Hurricane Electric LLC

Adjacent networks

• AS6461 Zayo Bandwidth
• AS3257 GTT Communications Inc.
• AS6939 Hurricane Electric LLC

Routing security

• RPKI: 0 valid, 0 invalid and 16 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 13% of announcements registered; 2 route objects.
• Listed in as-sets: AS-GTTCUST, AS-GTTCUST6, AS-HURRICANE, AS-ROGERS:AS-CUSTOMERS, AS-TRANSROUTE-SPEC, AS-XO-B.