ASN AS12151 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS12151?

AS12151 is listed under Learning Tree International, Inc..

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?

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AS12151 Learning Tree International, Inc.

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Learning Tree International, Inc. learningtree.com

US 0 Routes

AS Data

AS12151

AS12151 – Learning Tree International, Inc.

AS Number	12151
AS Name	LEARNING-TREE-INTL-OPERATIONS
Organization	Learning Tree International, Inc.(lti-34)
Country	US
Website	learningtree.com
Number of IPv4 Routes	0
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2006-11-01

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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:       12151
ASName:         LEARNING-TREE-INTL-OPERATIONS
ASHandle:       AS12151
RegDate:        2006-11-01
Updated:        2016-12-20    
Ref:            https://rdap.arin.net/registry/autnum/12151


OrgName:        Learning Tree International, Inc.
OrgId:          LTI-34
Address:        13650 Dulles Technology Drive
Address:        Suite 400
City:           Herndon
StateProv:      VA
PostalCode:     20171
Country:        US
RegDate:        2002-10-24
Updated:        2021-10-22
Comment:        http://www.learningtree.com
Ref:            https://rdap.arin.net/registry/entity/LTI-34


OrgNOCHandle: ARINM9-ARIN
OrgNOCName:   ARINMGR
OrgNOCPhone:  +1-703-709-5944 
OrgNOCEmail:  isroot@learningtree.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/ARINM9-ARIN

OrgAbuseHandle: ABUSE2163-ARIN
OrgAbuseName:   Abuse
OrgAbusePhone:  +1-703-709-9119 
OrgAbuseEmail:  abuse@learningtree.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE2163-ARIN

OrgTechHandle: ARINM9-ARIN
OrgTechName:   ARINMGR
OrgTechPhone:  +1-703-709-5944 
OrgTechEmail:  isroot@learningtree.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ARINM9-ARIN

OrgDNSHandle: ARINM9-ARIN
OrgDNSName:   ARINMGR
OrgDNSPhone:  +1-703-709-5944 
OrgDNSEmail:  isroot@learningtree.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/ARINM9-ARIN

OrgRoutingHandle: ARINM9-ARIN
OrgRoutingName:   ARINMGR
OrgRoutingPhone:  +1-703-709-5944 
OrgRoutingEmail:  isroot@learningtree.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/ARINM9-ARIN

RAbuseHandle: CWH33-ARIN
RAbuseName:   Whitnel, Chuck 
RAbusePhone:  +1-703-925-5600 
RAbuseEmail:  chuck_whitnel@learningtree.com
RAbuseRef:    https://rdap.arin.net/registry/entity/CWH33-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.
#