I take it this happens from time to time in places with overlay area codes.
I just got a call on a telephone whose number is in area 410. The caller had used area code 410 when he should have used area code 443.
The prefix was 278 (reached the one in 410 when the one in 443 was intended).
I think the caller ID display I saw had 410-525.***** Moderator's Note *****
If the telephone is in area 410, and the caller "had used area code410 when he should have used 443", isn't that just a wrong number?
Assuming you meant the obverse, if the area code was changing, there would be a time period during which either area code would map to the same exchange code(s), but if an overlay was added, then this sounds like a translation error.
Note, however, that since your post was sent from a .mil address, I assume you're using a DoD phone and other factors may apply: whatever the successor is to Autovon, the translations are handled by DoD and they may follow different rules.
Bill Horne Temporary Moderator
-- Remember to put [telecom] at the start of your subject line: if you don't, your post waits until I scan the "rest of" bucket and I may miss it.