% APNIC found the following authoritative answer from: whois.arin.net

#
# 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.
#

NetRange:       2620:104:4000:: - 2620:104:400F:FFFF:FFFF:FFFF:FFFF:FFFF
CIDR:           2620:104:4000::/44
NetName:        METASWITCH-V6
NetHandle:      NET6-2620-104-4000-1
Parent:         ARIN-V6-ENDUSER-BLOCK (NET6-2620-1)
NetType:        Direct Allocation
OriginAS:       
Organization:   Metaswitch Networks Corp. (DCC-138)
RegDate:        2011-05-26
Updated:        2025-07-03
Ref:            https://rdap.arin.net/registry/ip/2620:104:4000::

OrgName:        Metaswitch Networks Corp.
OrgId:          DCC-138
Address:        1064 S. North County Blvd
Address:        Suite 500
City:           Pleasant Grove
StateProv:      UT
PostalCode:     84062
Country:        US
RegDate:        2011-04-12
Updated:        2025-04-29
Ref:            https://rdap.arin.net/registry/entity/DCC-138

OrgNOCHandle: ALIAN9-ARIN
OrgNOCName:   Alianza Operations
OrgNOCPhone:  +1-801-701-1277 
OrgNOCEmail:  platform-ops@alianza.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/ALIAN9-ARIN

OrgAbuseHandle: SDB42-ARIN
OrgAbuseName:   Briggs, Steven D
OrgAbusePhone:  +1-801-891-8171 
OrgAbuseEmail:  steven@alianza.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/SDB42-ARIN

OrgAbuseHandle: ALIAN9-ARIN
OrgAbuseName:   Alianza Operations
OrgAbusePhone:  +1-801-701-1277 
OrgAbuseEmail:  platform-ops@alianza.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ALIAN9-ARIN

OrgDNSHandle: ALIAN9-ARIN
OrgDNSName:   Alianza Operations
OrgDNSPhone:  +1-801-701-1277 
OrgDNSEmail:  platform-ops@alianza.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/ALIAN9-ARIN

OrgRoutingHandle: BURGO44-ARIN
OrgRoutingName:   Burgon, Jay 
OrgRoutingPhone:  +1-801-802-6400 
OrgRoutingEmail:  jay.burgon@alianza.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/BURGO44-ARIN

OrgTechHandle: BURGO44-ARIN
OrgTechName:   Burgon, Jay 
OrgTechPhone:  +1-801-802-6400 
OrgTechEmail:  jay.burgon@alianza.com
OrgTechRef:    https://rdap.arin.net/registry/entity/BURGO44-ARIN

OrgTechHandle: SDB42-ARIN
OrgTechName:   Briggs, Steven D
OrgTechPhone:  +1-801-891-8171 
OrgTechEmail:  steven@alianza.com
OrgTechRef:    https://rdap.arin.net/registry/entity/SDB42-ARIN

OrgTechHandle: LEA23-ARIN
OrgTechName:   Abbott, Lance Edward
OrgTechPhone:  +1-801-802-6400 
OrgTechEmail:  lance.abbott@alianza.com
OrgTechRef:    https://rdap.arin.net/registry/entity/LEA23-ARIN

RTechHandle: SDB42-ARIN
RTechName:   Briggs, Steven D
RTechPhone:  +1-801-891-8171 
RTechEmail:  steven@alianza.com
RTechRef:    https://rdap.arin.net/registry/entity/SDB42-ARIN

RTechHandle: AMO106-ARIN
RTechName:   Moore, Alex 
RTechPhone:  +44-208-362-7085 
RTechEmail:  alexmoore@microsoft.com
RTechRef:    https://rdap.arin.net/registry/entity/AMO106-ARIN

RTechHandle: BUTLE602-ARIN
RTechName:   Butler-Lee, Sean 
RTechPhone:  +44 20 8366 1177 
RTechEmail:  sean.butlerlee@alianza.com
RTechRef:    https://rdap.arin.net/registry/entity/BUTLE602-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.
#