Fixed line
Numbers starting with 6421
8 Singapore fixed line numbers in this prefix appear on public websites.
About the 6421 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 6421 xxxx, internationally as +65 6421 xxxx, and as 8-digit 6421xxxx.
6421 numbers found on the web
+65 6421 0500
6421 0500 · 64210500 · Fixed line
Clothing - Singapore Business Guide on sbg.sg
1 web mention
+65 6421 3200
6421 3200 · 64213200 · Fixed line
Contact Us – ASPRI Email on aspri.com.sg
1 web mention
+65 6421 3201
6421 3201 · 64213201 · Fixed line
Past Events – ASPRI Email on aspri.com.sg
1 web mention
+65 6421 3202
6421 3202 · 64213202 · Fixed line
Events for September 2026 – ASPRICalendar of Events Email on aspri.com.sg
1 web mention
+65 6421 3205
6421 3205 · 64213205 · Fixed line
Career Conversion Programme – Overseas Markets Immersion Programme (OMIP) – ASPRI Email on aspri.com.sg
1 web mention
+65 6421 3207
6421 3207 · 64213207 · Fixed line
Membership – ASPRI Email on aspri.com.sg
1 web mention
+65 6421 3220
6421 3220 · 64213220 · Fixed line
Data Protection for Trainer Candidates – ASPRI-IPI on ipi.org.sg
1 web mention
+65 6421 8500
6421 8500 · 64218500 · Fixed line
Retina Centre | Singapore National Eye CentreBack to top on snec.com.sg
1 web mention