[comp.dcom.telecom] numbers in use but not recognized yet

cmoore@BRL.MIL (VLD/VMB) (02/03/89)

A reader previously wrote of being in a new area code (508 in Massachusetts)
and learning that some people in distant areas could not yet call 508 area.

This apparently also happens with prefixes.  Once in Maryland before 0+number
went away, I attempted to dial 0-850-xxxx and it got rejected; 850 was a
rather new prefix in the Baltimore-Washington Int'l airport area.  And
someone else in Maryland could not call 202-994 prefix (long-distance, to
DC).  (I.e. both calls required help from a human operator.)
Was there a similar experience with people on N0X/N1X prefixes?  (I.e. some
people in distant areas had calls to such prefixes rejected by their local
equipment?)