The mobile number prefix "09" in the Philippines is used by several major networks. Specifically:

• Smart Communications and Talk N' Text (TNT) use prefixes starting with 0907, 0908, 0909, 0910, 0911, 0912, 0913, 0914, 0918, 0919, 0920, 0921, 0928, 0929, 0930, 0938, 0939, 0940, 0946, 0947, 0948, 0949, 0950, 0951, 0970, 0981, 0989, 0992, 0998, and 0999

• Sun Cellular (now part of Smart) uses prefixes like 0922, 0923, 0924, 0925, 0931, 0932, 0933, 0934, 0941, 0942, 0943, and 0944

• Globe Telecom and TM (Touch Mobile) use prefixes such as 0817, 0905, 0906, 0915, 0916, 0917, 0926, 0927, 0935, 0936, 0937, 0945, 0955, 0956, 0965, 0966, 0975, 0977, 0994, 0995, 0996, and 0997

Therefore, a prefix starting with "09" could belong to any of these networks, depending on the specific digits following "09". For example, 0908 is a Smart number, while 0937 is Globe/TM

. This prefix system helps identify the network provider of a mobile number in the Philippines.