Data as of Nov 8, 2026
Autonomous system

AS16681

Educational Testing Service

Announces 2,048 addresses in 8 prefixes. None of it is anonymizer space.

Type
Business
US

Announced prefixes

Arrived
PrefixTypeRPKI
144.81.10.0/24
since Oct 2017
Business
144.81.11.0/24
since Sep 2016
Business
144.81.53.0/24
since May 2017
Business
144.81.54.0/24
since Mar 2015
Business
144.81.85.0/24
since Mar 2015
Business
144.81.97.0/24
since Mar 2015
Business
144.81.111.0/24
since Mar 2015
Business
144.81.127.0/24
since Mar 2015
Business

Network & history

Routing patterns

How its announcements have moved

Arrivals

Year each prefix's current origin began announcing it