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Microsoft
#83
skype.com
Vonage
#404
vonage.com
Mitel
#442
mitel.com
8x8
#580
8x8.com
Rebtel
#757
rebtel.com
Nextiva
#1041
nextiva.com
Fonality
#1241
fonality.com
iTalk Global Communications, Inc
#1562
italkbb.com
Shaw Communications
#1900
shaw.ca
Ooma, Inc.
#1959
ooma.com
Broadvoice
#2977
broadvoice.com
Phone Power
#4048
phonepower.com
Bandwidth Inc.
#4611
bandwidth.com
Local 03
#4881
local03.com
Grasshopper
#5338
grasshopper.com
TollFreeForwarding.com
#5712
tollfreeforwarding.com
Digium
#6375
digium.com
VOIP.COM
#7903
voip.com
3CX
#8213
3cx.com
VOIPO.com
#8414
voipo.com
WhichVoIP.com
#8495
whichvoip.com
TMC
#9487
tmcnet.com
Social Blade LLC
#9537
socialblade.com
Callture Inc.
#10607
callture.com
FreedomVoice
#12364
freedomvoice.com
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