On 16-Mar-1958, Seattle changed over from 6 digit local phone numbers to 7 digit local numbers. Here is a table of the before-and-after. My source is the front cover of the first phone book that was issued after the cutover.

Seattle

Old	New	Wire center
Adams	Adams 2
Alder	Atwater 3
Avalon	West 5
Axminster	Juniper 5
Axminster	Juniper 6
Broadway	Cedar 7
Capitol	East 3
Cherry	Cherry 3
Columbia	Time 8
Dexter	Sunset 4
East	East 2
Elliott	Main 3
Emerson	Emerson 2
Evergreen	Melrose 3
Fillmore	Lakeview 4
Franklin	East 4
Garfield	Atwater 2
Gladstone	Emerson 3
Hemlock	Sunset 3
Holly	West 7
Kenwood	Lakeview 2
Lander	Parkway 3
Logan	Cherry 2
Main	Main 2
Melrose	Melrose 2
Minor	East 5
Mohawk	Parkway 5
Murdock	Atwater 4
Mutual	Mutual 2
Plaza	Lakeview 5
Rainier	Parkway 2
Seneca	Main 4
Sunset	Sunset 2
Swift	Cherry 4
Twining	Atwater 4
Vermont	Lakeview 3
Wabash	Emerson 4
West	West 2

Bainbridge

Old	New	Wire center
Viking	Viking 2

Bellevue

Old	New	Wire center
Gibson	Glencourt 4
Porter	Sherwood 6

Bothell (WCTC)

Old	New	Wire center
Hunter	Hunter 6

Des Moines

Old	New	Wire center
Trinity	Trinity 8
Gypsy	Taylor 4

Halls Lake (WCTC)

including:

• Alderwood Manor
• Edmonds
• Lynnwood
• Mountlake Terrace

Old	New	Wire center
Greenwood	Prospect 8
Myrtle	Prospect 6

Issaquah

Old	New	Wire center
Exbrook	Exbrook 2

Kirkland (WCTC)

Old	New	Wire center
Vandyke	Vandyke 2

Redmond (WCTC)

Old	New	Wire center
Tucker	Tucker 5

Renton

Old	New	Wire center
Olive	Alpine 5

Renton Boeing

Old	New	Wire center
Broadway	Cedar 7

Richmond Beach (WCTC)

Old	New	Wire center
Lincoln	Lincoln 2
Lincoln	Lincoln 6