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grep or awk search on line has no this format x-xxx-xxxx

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linux-howto

http://www.linuxquestions.org – i have these 4 lines and I want to exclude the line has no this string format X-XXX-XXXX Code: [email protected]              #ry-dsl-e9#MV172-00-309-UKALC-D atm 1/1/01/10:0.35#1-278-8297                                          [email protected]                RY-DSL-HU02#1/0/0#AlJalawyah_JLWHEAAE-A_HiX5635_11_13#tel.net.sa#0025-69ae-60b3#3-840-6442              26673 (HowTos)