ASN AS16681 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS16681?

AS16681 is listed under Educational Testing Service.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS16681 Educational Testing Service

ASN Lookup Tool

Educational Testing Service ets.org

US 8 Routes

AS Data

AS16681

AS16681 – Educational Testing Service

AS Number	16681
AS Name	ETS
Organization	Educational Testing Service(ets-1)
Country	US
Website	ets.org
Number of IPv4 Routes	8
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2000-05-17

ASN Intelligence API for production workflows

Use ASN data for AS16681 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
144.81.85.0/24	AS16681	Educational Testing Service	Educational Testing Service	256
144.81.53.0/24	AS16681	Educational Testing Service	Educational Testing Service	256
144.81.111.0/24	AS16681	Educational Testing Service	Educational Testing Service	256
144.81.127.0/24	AS16681	Educational Testing Service	Educational Testing Service	256
144.81.97.0/24	AS16681	Educational Testing Service	Educational Testing Service	256
144.81.10.0/24	AS16681	Educational Testing Service	Educational Testing Service	256
144.81.54.0/24	AS16681	Educational Testing Service	Educational Testing Service	256
144.81.11.0/24	AS16681	Educational Testing Service	Educational Testing Service	256

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       16681
ASName:         ETS
ASHandle:       AS16681
RegDate:        2000-05-17
Updated:        2024-11-07    
Ref:            https://rdap.arin.net/registry/autnum/16681


OrgName:        Educational Testing Service
OrgId:          ETS-1
Address:        Rosedale Road
Address:        MS: 30D
City:           Princeton
StateProv:      NJ
PostalCode:     08541
Country:        US
RegDate:        1990-11-20
Updated:        2025-04-04
Ref:            https://rdap.arin.net/registry/entity/ETS-1


OrgAbuseHandle: RODRI1530-ARIN
OrgAbuseName:   Rodrigo, John 
OrgAbusePhone:  +1-609-734-5280 
OrgAbuseEmail:  jrodrigo@ets.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/RODRI1530-ARIN

OrgNOCHandle: RODRI1530-ARIN
OrgNOCName:   Rodrigo, John 
OrgNOCPhone:  +1-609-734-5280 
OrgNOCEmail:  jrodrigo@ets.org
OrgNOCRef:    https://rdap.arin.net/registry/entity/RODRI1530-ARIN

OrgRoutingHandle: RODRI1530-ARIN
OrgRoutingName:   Rodrigo, John 
OrgRoutingPhone:  +1-609-734-5280 
OrgRoutingEmail:  jrodrigo@ets.org
OrgRoutingRef:    https://rdap.arin.net/registry/entity/RODRI1530-ARIN

OrgDNSHandle: RODRI1530-ARIN
OrgDNSName:   Rodrigo, John 
OrgDNSPhone:  +1-609-734-5280 
OrgDNSEmail:  jrodrigo@ets.org
OrgDNSRef:    https://rdap.arin.net/registry/entity/RODRI1530-ARIN

OrgTechHandle: RODRI1530-ARIN
OrgTechName:   Rodrigo, John 
OrgTechPhone:  +1-609-734-5280 
OrgTechEmail:  jrodrigo@ets.org
OrgTechRef:    https://rdap.arin.net/registry/entity/RODRI1530-ARIN

RAbuseHandle: RODRI1530-ARIN
RAbuseName:   Rodrigo, John 
RAbusePhone:  +1-609-734-5280 
RAbuseEmail:  jrodrigo@ets.org
RAbuseRef:    https://rdap.arin.net/registry/entity/RODRI1530-ARIN

RNOCHandle: RODRI1530-ARIN
RNOCName:   Rodrigo, John 
RNOCPhone:  +1-609-734-5280 
RNOCEmail:  jrodrigo@ets.org
RNOCRef:    https://rdap.arin.net/registry/entity/RODRI1530-ARIN

RTechHandle: JF569-ARIN
RTechName:   Fowler, Jack 
RTechPhone:  +1-609-734-5170 
RTechEmail:  jfowler@ets.org
RTechRef:    https://rdap.arin.net/registry/entity/JF569-ARIN

RTechHandle: RODRI1530-ARIN
RTechName:   Rodrigo, John 
RTechPhone:  +1-609-734-5280 
RTechEmail:  jrodrigo@ets.org
RTechRef:    https://rdap.arin.net/registry/entity/RODRI1530-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number	Description	Country
AS7018	AT&T Enterprises, LLC	US
AS701	Verizon Business/UUnet	US
AS701	Verizon Business	US

Upstreams

AS Number	Description	Country
AS7018	AT&T Enterprises, LLC	US
AS701	Verizon Business	US