Singapore up to 150th in FIFA World Rankings
The Lions beat Brunei 5-1 at home and Cambodia 0-4 away, before an impressive 0-0 draw against the Samurai Blue in Japan.
Singapore's draw against Japan was worth 314.5 ranking points, almost as much as the win against Brunei (318.75) thanks to their opponents' high ranking.
This latest move makes Singapore the 24th-ranked Asian country and the fourth-ranked team in Southeast Asia.
38th-ranked Iran remained top dogs in Asia, with Japan (50), South Korea (52), Asian champions Australia (59) and the United Arab Emirates (69) rounding up the top five.
Southeast Asia's best movers were the Philippines, who rose 13 places to an all-time high of 124th after wins against Yemen and Bahrain.
The Azkals are still top of Southeast Asia, but there was bad news for the rest of the region.
Thailand plummeted 11 places to 140th, Vietnam 16 places to 141st, Myanmar 19 places to 162nd and Timor-Leste 19 places to 165th.
Singapore's neighbours Malaysia did not fare much better as they slipped 6 places to 168th, their lowest position since 2008, after draws against Hong Kong and Timor-Leste and a 0-6 loss to Palestine.