44UK Free UK Numbers United Kingdom
- International VoIP Wholesale Provider
- Internet Telephony Service Provider
- Voip Termination ISP
- Fax To Fax
- PC to Phone
- Phone To PC
- Phone To Phone
- Termination
- Voice and Video Conferencing
- Cisco Systems
- Quintum
- another
This is a device allowing a user to make VoIP calls using session initiation protocol (SIP). SIP is a telecommunication technology developed as a fast, easy standard for delivering IP-based data, voice, and video communications.
Top countries:
United States 1294
India 440
United Kingdom 425
Canada 348
Bangladesh 338
China 142
Pakistan 134
Australia 133
Spain 123
Russia 114View all countries