Each telephone is assigned a seven-digit telephone number unique only within its respective plan area consisting of a three-digit central office code and a four-digit station number.
The telephone number consists of a three-digit central office code and a four-digit station number. Each telephone is assigned a seven-digit telephone number unique only within its respective plan area.
Each telephone is assigned a seven-digit telephone number unique only within its respective plan area. The telephone number consists of a three-digit central office code and a four-digit station number.
Each telephone is assigned a seven-digit telephone number unique only within its respective plan area. The telephone number consists of a three-digit central office code and a four-digit station number.