Editing Directory assistance (section)

===Billing===
Historically, the [[Telecommunications tariff|tariffs]] for wireline telephone service allowed subscribers to place a certain number of directory assistance calls for free each month.  More recently,{{When?|date=September 2024}} telephone companies are charging subscribers for every directory assistance call.{{Cn|date=September 2024}}

U.S. wireline telephone companies classify DA into four rate classes:

# 411 LDA: Local Directory Assistance. 411 is dialed, and the operator is requested to search for a listing in a group of area codes local to the caller ([[Local access and transport area|LATA]]). Example: the caller lives in area code 630 (Oak Brook, Illinois) and requests a listing for a business in area code 312 (Chicago, Illinois). In this case, [[AT&T Illinois]] bills the call.
# 411 NDA: National Directory Assistance. 411 is dialed and the operator is requested to search for a listing in an area code not local to the caller. For example: The caller lives in area code 630 (Oak Brook, Illinois) and requests a listing for a business in area code 213 (Los Angeles, California). In this case, AT&T Illinois bills the call.
# (area code) 555–1212: National Directory Assistance. This example assumes the caller is in Oak Brook, Illinois (area code 630) and uses Verizon as their long-distance carrier. Example: The caller is looking for a listing in Los Angeles, California (area code 213) and dials 213-555-1212. In this case, Verizon bills the call.
# 00 and ask for the international directory assistance operator. [[AT&T Inc.|AT&T]] provides International Directory Assistance calls.