AS13572 — LAHEYCLINIC

AS13572 announces 2 IPv4 prefixes covering 4,096 addresses and 0 IPv6 prefixes.

About this network

Two /21s, one netname, one upstream, and a registrant that names the team that filed it.

What it's used for

• A hospital group's network. 4,096 addresses across two IPv4 prefixes, 199.255.48.0/21 and 208.64.112.0/21, one observed BGP neighbour, and no IPv6 announced.

Notable

• Both blocks are netname LAHEYCLINIC, registrant Lahey Clinic, Inc.; Network Services.
• The AS handle is the same string as the netname.
• Six addresses were queried for reverse DNS and none returned a name.

Interesting

• The semicolon and the department after it is a registry convention for recording which internal team owns the record. It is a small disclosure, and a consistent one: both objects carry it, so the same group filed both.
• Two /21s from unrelated ranges, announced whole with no subdivision, is a network that grew by being given a second allocation rather than by splitting the first. Nothing here is being steered; the routing table sees exactly what the registry sees.
• One upstream for a hospital group is the number that stands out. Clinical systems mostly face inward, and the connections that matter to a hospital are private circuits to labs, insurers and affiliated practices, none of which appear in a routing table.

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

Announced prefixes

• 199.255.48.0/21
• 208.64.112.0/21

Upstream networks

• AS40127 Longwood Medical and Academic Area (LMA)

Adjacent networks

• AS40127 Longwood Medical and Academic Area (LMA)

Routing security

• RPKI: 0 valid, 0 invalid and 5 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 5 route objects.
• Listed in as-sets: AS-CCF, AS-CCF-TEST, AS-COMCAST-EDIA, AS-HARV, AS-NETMAGIC-NOK, AS198949:AS-SD.