Fixed line
Numbers starting with 6399
12 Singapore fixed line numbers in this prefix appear on public websites.
About the 6399 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 6399 xxxx, internationally as +65 6399 xxxx, and as 8-digit 6399xxxx.
6399 numbers found on the web
+65 6399 0543
6399 0543 · 63990543 · Fixed line
Car Rental in Osaka from S$Â 15/day - Search for Rental Cars on KAYAK on kayak.sg
1 web mention
+65 6399 0785
6399 0785 · 63990785 · Fixed line
Taoyuan Jiari Jiudian. Xi'an Hotel Deals & Reviews - KAYAK on kayak.sg
1 web mention
+65 6399 1122
6399 1122 · 63991122 · Fixed line
【JCCI基金】 2026年度募金活動～寄付のお願い – シンガポール日本商工会議所 – Japanese Chamber of Commerce & Industry, Singapore on jcci.org.sg
1 web mention
+65 6399 1125
6399 1125 · 63991125 · Fixed line
2025年JCCI会員懇親パーティー「ラッキードロー賞品ご提供方お願い」 – シンガポール日本商工会議所 – Japanese Chamber of Commerce & Industry, Singapore on jcci.org.sg
1 web mention
+65 6399 1127
6399 1127 · 63991127 · Fixed line
2026年8月号月報公開のお知らせ – シンガポール日本商工会議所 – Japanese Chamber of Commerce & Industry, Singapore on jcci.org.sg
1 web mention
+65 6399 1128
6399 1128 · 63991128 · Fixed line
（全会員向け）生活産業部会主催「和太鼓の歴史と海外における太鼓の多様性の力」ミニセミナーならびに実践ワークショップのご案内 – シンガポール日本商工会議所 – Japanese Chamber of Commerce & Industry, Singapore on jcci.org.sg
1 web mention
+65 6399 1129
6399 1129 · 63991129 · Fixed line
第二工業部会主催 食品関連企業向け分譲型物流施設「Gourmet Xchangeプロジェクト視察会」 – シンガポール日本商工会議所 – Japanese Chamber of Commerce & Industry, Singapore on jcci.org.sg
1 web mention
+65 6399 3412
6399 3412 · 63993412 · Fixed line
Singapore Accounting, Audit & Corporate Services | JDT on jdt.com.sg
1 web mention
+65 6399 4499
6399 4499 · 63994499 · Fixed line
Villa Petra S$Â 56. Medjugorje Hotel Deals & Reviews - KAYAK on kayak.sg
1 web mention
+65 6399 5000
6399 5000 · 63995000 · Fixed line
Holiday Inn & Suites Shin Osaka By IHG S$Â 61. Osaka Hotel Deals & Reviews - KAYAK on kayak.sg
1 web mention