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Area Codes 248 & 947
Telephone Central Office Building Pictures

The following are respresntative examples of telephone central office buildings in Area Codes 248 & 947 (Michigan).

Click on the pictures below for a larger version.


Birmingham

Photo 2
 

Listing Updated:
November 2011

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
BRHMMIMNDS0

Switch Type:
Nokia Siemens EWSD DE5

Prefixes Served:
(248) 203, 258, 433, 540, 549, 554, 593-4, 642, 644-7, 901, 988, 723

Notes:
This CO building once had a WECO 1AESS until mid-2011. The NNX codes that were once served by the 1AESS are now being served by the existing EWSD.

Birmingham was the second area in the US to have nationwide Direct Distance Dialing (DDD). Also serves parts of Royal Oak. Source: TCO

 

Farmington
 

Listing Updated:
November 2011

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
FRTNMIMNDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(248) 426-7, 442, 471, 473-4, 476-8, 615, 888

Notes:
Source: TCO

 

Pontiac
 

Listing Updated:
November 2011

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
PNTCMIMNDS0
PNTCMIMNDS2

Switch Type:
DS0: Genband/Nortel DMS-100
DS2: Genband/Nortel DMS-100

Prefixes Served:
DS0: (248) 339, 451-4, 454, 456, 753, 758, 857-8, 874, 972, 975

DS2: (248) 253, 322, 332-5, 338, 745

Notes:
Source: TCO

 

Royal Oak
 

Listing Updated:
November 2011

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
RYLOMIMNDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(248) 336, 398-9, 414, 541-8, 582, 584, 586, 591, 691
(313) 564

Notes:
Also serves parts of Detroit Zone 03. Source: TCO

 

Southfield

"Main"
 

Listing Updated:
November 2011

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
SFLDMIMNDS0
SFLDMIMNDS1

Switch Type:
DS0: Genband/Nortel DMS-100
DS1: Genband/Nortel DMS-100

Prefixes Served:
DS0: (248) 208, 223, 304, 351-6, 359, 445, 455, 501, 503, 603, 799, 827, 902-3, 945, 948
(313) 232-3, 507-8, 786

DS1: (248) 213, 262-3, 350, 357-8, 368, 372, 386, 447-8, 746

Notes:
Also serves parts of Detroit Zone 05. Source: TCO

 

 


Copyright 2012 Telephone Central Office Building Pictures
Page last modified November 5, 2012
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