IP telephony
Numbers starting with 3990
1 Singapore ip telephony number in this prefix appear on public websites.
About the 3990 prefix
This number uses Singapore's 3-prefix IP telephony range. Community comments often help clarify whether it belongs to a business line, VoIP service, or a suspicious caller.
3-prefix numbers are typically used for IP telephony services in Singapore. Numbers in this list are written locally as 3990 xxxx, internationally as +65 3990 xxxx, and as 8-digit 3990xxxx.
3990 numbers found on the web
+65 3990 7777
3990 7777 · 39907777 · IP telephony
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1 web mention