cmoore@brl.mil (02/19/91)
The Maryland helpline at 800-477-4704 will, if you entered a prefix which has local service across what will be the 301/410 border, add a recorded note telling that such local calls will become ten digits, and goes on to say "that is", 301 (or 410 as the case may be) + seven digits. However, I found no comment about local calls across an area code boundary other than the new 301/410 boundary. Notice these samples: 588 (Silver Spring) -- has the comment (see above) about local calls into area 410, which will include Columbia except for those lines local to DC. (Silver Spring already has NPA+7D for local calls to DC and Va.) 755 (Warwick) -- next to the Delaware border, and local to 302-378 Middletown; no comment made about local calls, so I assume 7D to Middletown, Delaware will remain as is.