system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 when I call a 10-digit number, and get the "it is not necessary to dial a 1 and area code...please try again" message, why can't the phone company just go ahead and complete the call?  Doesn't it have enough info?
gpt
When you dial 1 you're accessing your CO's long distance trunks, thus making a local call over the LD circuits will incur LD charges so they do not route the call. Some new telco systems will recognize a local call and re-route that call to the proper trunks.