757-480-99xx
March 2010
Dialed by: ThoughtPhreaker and sToRm
Notes: Oh my, what do we have here? :)

757-480-9900 - Potomac Network Test Center (prompts for 5-digit extension ID)
757-480-9904 - Ringout
757-480-9906 - Silent term? Supes
757-480-9907 - 102-type Milliwatt
757-480-9908 - Silent term? Supes, no loop w/9907
757-480-9909 - Silent term? Supes
757-480-9910 - Ringout
757-480-9912 - 100-type milliwatt
757-480-9913 - Ringout
757-480-9920 - Ringout
757-480-9922 - SSCU
757-480-9923 - Ringout
757-480-9924 - Ringout
757-480-9925 - Forward to 212-227-9971, NIS
757-480-9931 - Ringout
757-480-9932 - 1AESS busy signal
757-480-9933 - 480 hz tone, non-supe
757-480-9934 - 440 hz tone, non-supe
757-480-9935 - Ringout
757-480-9937 - 105-type test, a little clicky sounding + odder tone set. Older?
757-480-9938 - 105-type test, a little clicky sounding + odder tone set. Older?
757-480-9939 - Burst of 2200hz + silence? Hangs up eventually, try DTMFing
757-480-9940 - Same as 9939
757-480-9944 - Sweep tone!
757-480-9945 - Echo test?
757-480-9946 - Busy via SS7
757-480-9947 - 102-type Milliwatt, clicks when tone stops
757-480-9948 - Number cannot be reached from calling area rec
757-480-9949 - 102-type milliwatt
757-480-9956 - ringback test
757-480-9957 - ring out
757-480-9964 - reorder
757-480-9966 - reorder
757-480-9969 - ring out
757-480-9971 - silent? (supes)
757-480-9980 - ring out
757-480-9987 - ring out
757-480-9989 - ring out
757-480-9990 - Verizon VMS
757-480-9992 - VMB
757-480-9994 - echo test
757-480-9996 - Verizon VMS
757-480-9999 - busy