ASN AS21778 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21778?

AS21778 is listed under Dimension Data North America, 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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AS21778 Dimension Data North America, Inc.

ASN Lookup Tool

Dimension Data North America, Inc. dimensiondata.com

US 12 Routes

AS Data

AS21778

AS21778 – Dimension Data North America, Inc.

AS Number	21778
AS Name	NET-DIDATA-NY
Organization	Dimension Data North America, Inc.(dimens-39)
Country	US
Website	dimensiondata.com
Number of IPv4 Routes	11
Number of IPv6 Routes	1
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2001-06-20

ASN Intelligence API for production workflows

Use ASN data for AS21778 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
129.250.40.0/24	AS21778	Dimension Data North America, Inc.	NTT America, Inc.	256
129.250.161.128/27	AS21778	Dimension Data North America, Inc.	NTT America, Inc.	32
204.0.1.192/27	AS21778	Dimension Data North America, Inc.	NTT America, Inc.	32
207.55.138.24/29	AS21778	Dimension Data North America, Inc.	NTT America Dallas/Fort Worth	8
128.241.34.0/24	AS21778	Dimension Data North America, Inc.	NTT Ltd.	256
165.254.119.64/27	AS21778	Dimension Data North America, Inc.	NTT IT	32
204.2.200.0/23	AS21778	Dimension Data North America, Inc.	NTT America, Inc.	512
204.2.193.16/29	AS21778	Dimension Data North America, Inc.	NTT America, Inc.	8
204.56.94.0/24	AS21778	Dimension Data North America, Inc.	Dimension Data	256
129.250.161.0/24	AS21778	Dimension Data North America, Inc.	NTT America, Inc.	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:       21778
ASName:         NET-DIDATA-NY
ASHandle:       AS21778
RegDate:        2001-06-20
Updated:        2012-03-02    
Ref:            https://rdap.arin.net/registry/autnum/21778


OrgName:        Dimension Data North America, Inc.
OrgId:          DIMENS-39
Address:        100 Motor Parkway
Address:        Suite 158
Address:        5th Floor
City:           Hauppauge
StateProv:      NY
PostalCode:     11788
Country:        US
RegDate:        2001-06-20
Updated:        2024-05-14
Ref:            https://rdap.arin.net/registry/entity/DIMENS-39


OrgNOCHandle: BESSE40-ARIN
OrgNOCName:   Bessey, Michael 
OrgNOCPhone:  +1-817-845-3054 
OrgNOCEmail:  michael.bessey@global.ntt
OrgNOCRef:    https://rdap.arin.net/registry/entity/BESSE40-ARIN

OrgDNSHandle: KODAK-ARIN
OrgDNSName:   Kodakkadath, Satish 
OrgDNSPhone:  +1-617-517-1733 
OrgDNSEmail:  satish.kodakkadath@nttdata.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/KODAK-ARIN

OrgNOCHandle: KODAK-ARIN
OrgNOCName:   Kodakkadath, Satish 
OrgNOCPhone:  +1-617-517-1733 
OrgNOCEmail:  satish.kodakkadath@nttdata.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/KODAK-ARIN

OrgAbuseHandle: BESSE40-ARIN
OrgAbuseName:   Bessey, Michael 
OrgAbusePhone:  +1-817-845-3054 
OrgAbuseEmail:  michael.bessey@global.ntt
OrgAbuseRef:    https://rdap.arin.net/registry/entity/BESSE40-ARIN

OrgRoutingHandle: BESSE40-ARIN
OrgRoutingName:   Bessey, Michael 
OrgRoutingPhone:  +1-817-845-3054 
OrgRoutingEmail:  michael.bessey@global.ntt
OrgRoutingRef:    https://rdap.arin.net/registry/entity/BESSE40-ARIN

OrgTechHandle: BESSE40-ARIN
OrgTechName:   Bessey, Michael 
OrgTechPhone:  +1-817-845-3054 
OrgTechEmail:  michael.bessey@global.ntt
OrgTechRef:    https://rdap.arin.net/registry/entity/BESSE40-ARIN

OrgTechHandle: KODAK-ARIN
OrgTechName:   Kodakkadath, Satish 
OrgTechPhone:  +1-617-517-1733 
OrgTechEmail:  satish.kodakkadath@nttdata.com
OrgTechRef:    https://rdap.arin.net/registry/entity/KODAK-ARIN

OrgAbuseHandle: KODAK-ARIN
OrgAbuseName:   Kodakkadath, Satish 
OrgAbusePhone:  +1-617-517-1733 
OrgAbuseEmail:  satish.kodakkadath@nttdata.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/KODAK-ARIN

OrgDNSHandle: BESSE40-ARIN
OrgDNSName:   Bessey, Michael 
OrgDNSPhone:  +1-817-845-3054 
OrgDNSEmail:  michael.bessey@global.ntt
OrgDNSRef:    https://rdap.arin.net/registry/entity/BESSE40-ARIN

OrgRoutingHandle: KODAK-ARIN
OrgRoutingName:   Kodakkadath, Satish 
OrgRoutingPhone:  +1-617-517-1733 
OrgRoutingEmail:  satish.kodakkadath@nttdata.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/KODAK-ARIN

RTechHandle: DPA224-ARIN
RTechName:   Patecell, Doug 
RTechPhone:  +1-571-203-4048 
RTechEmail:  doug.patecell@dimensiondata.com
RTechRef:    https://rdap.arin.net/registry/entity/DPA224-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
AS2914	NTT America, Inc.	US

Upstreams

AS Number	Description	Country
AS2914	NTT America, Inc.	US