1976 Houston, TX

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;Southwfstern

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Tel~i

'1< CQmpany

197(,

Houstonmetropolitan

local Calling Scopes Of Southwestern Bell Customers Central,

1st Tier Zones:

All phones in Central, ht and 2nd Tier Zanet. Customers in 3rd and 4th Tier Exchanges with optional Houston Metro service.

area map

2nd Tier Zones: All phones

in Central,

1st and 2nd Tier Zones.

All phones in participating bordering their own.

INDEPENDENTTELEPHONECOMPANYEXCHANGES Fort Bend Tel. Co. I Katy I Home Tel. Co. I Humble I Nassau Bay Tel. Co. I Nassau Bay I Sugar land Tel. Co. I

General Tel. Co. of S W Arcola, Bacliff, Baytown, Crosby, Dickinson, Highlands, Huffman, Kemah league City, Stafford Baycliff, Beach City

Sugar land

I

3rd Tier Exchange.

Customers in other 3rd and 4th Tier Exchange. with optional Houston Metro service.

3rd and 4th Tier Exchanges: Optional Houston Metro S.r!lce-AIl phones in own exchange, Central, ht and 2nd . Tier Zones and all phones in participating 3rd and 4th Tier Exchanges with common boundan.. to their own. Local Service-Ail phones in own exchange and all phones in adjoining zones or participating exchanges.

On all Local Calls. Dial only the seven digit telephone number

D

Third Tier

Centrol Zone First Tier

SecondTier

...............

~

Fourth

Tier

IndependentCompany