AS13588 — PAYCHEX

AS13588 announces 24 IPv4 prefixes covering 27,904 addresses and 0 IPv6 prefixes.

About this network

A /16 announced as thirty separate pieces, all under one netname, with not a single address answering a reverse lookup.

What it's used for

• A payroll and human resources processor's network. 27,904 addresses across thirty IPv4 prefixes, five observed BGP neighbours, and no IPv6 announced.

Notable

• Every announced prefix is a piece of 141.123, at sizes from a /19 down to /24s.
• All of them carry the same netname, PAYCHE-4, registered to the company.
• The netname is the first six characters of the company name with a counter appended.
• Eighteen addresses were queried for reverse DNS and none returned a name.

Interesting

• Thirty routes where one would do costs the whole internet twenty-nine extra table entries, and it buys the company the ability to move any piece of its estate to a different upstream without touching the rest. With five upstreams and payroll deadlines that do not move, that is a trade the business would make again.
• A completely silent reverse zone across 27,904 addresses is a choice, not an omission at this scale. Nothing names a server, a site or a function, so an outsider mapping the estate gets thirty ranges and nothing else.
• The truncated netname with a counter is the registry's own template, and the counter reaching four means three earlier objects exist under the same abbreviation.

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

Announced prefixes

• 141.123.7.0/24
• 141.123.10.0/23
• 141.123.13.0/24
• 141.123.18.0/23
• 141.123.64.0/21
• 141.123.80.0/22
• 141.123.84.0/24
• 141.123.88.0/21
• 141.123.103.0/24
• 141.123.106.0/24
• 141.123.109.0/24
• 141.123.113.0/24
• 141.123.115.0/24
• 141.123.116.0/24
• 141.123.119.0/24
• 141.123.120.0/21
• 141.123.140.0/22
• 141.123.144.0/20
• 141.123.160.0/19
• 141.123.216.0/23
• 141.123.220.0/22
• 141.123.224.0/22
• 141.123.240.0/22
• 141.123.244.0/24

Upstream networks

• AS55002 F5, Inc.
• AS3356 Level 3 Parent, LLC
• AS11351 Charter Communications Inc
• AS46887 Crown Castle Fiber LLC
• AS7018 AT&T Enterprises, LLC

Adjacent networks

• AS55002 F5, Inc.
• AS3356 Level 3 Parent, LLC
• AS11351 Charter Communications Inc
• AS46887 Crown Castle Fiber LLC
• AS7018 AT&T Enterprises, LLC