Fixed line
Numbers starting with 6640
2 Singapore fixed line numbers in this prefix appear on public websites.
About the 6640 prefix
This looks like a Singapore fixed-line number. Reports often mention company switchboards, delivery callbacks, property agents, or unsolicited sales calls.
6-prefix numbers are commonly used for Singapore fixed-line services. Numbers in this list are written locally as 6640 xxxx, internationally as +65 6640 xxxx, and as 8-digit 6640xxxx.
6640 numbers found on the web
+65 6640 7064
6640 7064 · 66407064 · Fixed line
தமிழர் பேரவை, சிங்கப்பூர் || Tamils Representative Council, Singapore on trc.org.sg
1 web mention
+65 6640 9987
6640 9987 · 66409987 · Fixed line
Engine Optimization - Singapore Business Guide on sbg.sg
2 web mentions