Fixed line
Numbers starting with 6643
15 Singapore fixed line numbers in this prefix appear on public websites.
About the 6643 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 6643 xxxx, internationally as +65 6643 xxxx, and as 8-digit 6643xxxx.
6643 numbers found on the web
+65 6643 0300
6643 0300 · 66430300 · Fixed line
APSN | Empowered Lives for An Engaged Community and Inclusive SocietyAPSN – Empowered Lives for An Engaged Community and Inclusive Society on apsn.org.sg
1 web mention
+65 6643 0305
6643 0305 · 66430305 · Fixed line
APSN | » School Bus AdvertisementSchool Bus Advertisement – APSN on apsn.org.sg
1 web mention
+65 6643 6471
6643 6471 · 66436471 · Fixed line
Hiatus-triggered Model in the Next Presidential Election – Singapore Federation of Chinese Clan Associations on sfcca.sg
1 web mention
+65 6643 6475
6643 6475 · 66436475 · Fixed line
资助金 – Singapore Federation of Chinese Clan Associations on sfcca.sg
1 web mention
+65 6643 6476
6643 6476 · 66436476 · Fixed line
出版物 – 资料室 – Singapore Federation of Chinese Clan Associations on sfcca.sg
1 web mention
+65 6643 6478
6643 6478 · 66436478 · Fixed line
新加坡宗乡会馆基金 – Singapore Federation of Chinese Clan Associations on sfcca.sg
1 web mention
+65 6643 6479
6643 6479 · 66436479 · Fixed line
Duan Wu Carnival 2026 – Singapore Federation of Chinese Clan AssociationsDuan Wu Carnival 2026 on sfcca.sg
1 web mention
+65 6643 6486
6643 6486 · 66436486 · Fixed line
Hiatus-triggered Model in the Next Presidential Election – Singapore Federation of Chinese Clan Associations on sfcca.sg
1 web mention
+65 6643 6491
6643 6491 · 66436491 · Fixed line
总会消息 – 第 18 页 – Singapore Federation of Chinese Clan Associations on sfcca.sg
1 web mention
+65 6643 6969
6643 6969 · 66436969 · Fixed line
After Your Stay | Changi General HospitalBack to top on cgh.com.sg
1 web mention
+65 6643 9008
6643 9008 · 66439008 · Fixed line
Car Hire in Grafton - Search for Rental Cars on KAYAK on kayak.sg
1 web mention
+65 6643 9600
6643 9600 · 66439600 · Fixed line
Contact Us - Dyslexia Association of Singapore on das.org.sg
1 web mention
+65 6643 9999
6643 9999 · 66439999 · Fixed line
Hotel Kai S$Â 228. Singapore Hotel Deals & Reviews - KAYAK on kayak.sg
1 web mention