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Telephones - Site Codes for Domestic and International locations

This article explains a list of site codes to call between most campus locations.

Domestic Site Codes

 From/To Domestic
 TO 170:
Chicago Hyde Park Campus
 TO 171:
Chicago 401 N. Michigan
 TO 172:
Chicago Gleacher
 TO 173:
Washington DC
 TO 174:
San Francisco
 FROM:
Chicago Hyde Park Campus
 5 digits  171+5 digits  172+4 digits  173+5 digits  174+5 digits
 FROM:
Chicago 401 N. Michigan
 170+5 digits  5 digits  172+4 digits  173+5 digits  174+5 digits
 FROM:
Chicago Gleacher
 170+5 digits  171+5 digits  4 digits  173+5 digits  174+5 digits
 FROM:
Washington DC
 170+5 digits  171+5 digits  172+4 digits  5 digits  174+5 digits
 FROM:
San Francisco
 170+5 digits  171+5 digits  172+4 digits  173+5 digits  5 digits
 FROM:
London
 170+5 digits  171+5 digits  172+4 digits  173+5 digits  174+5 digits
 FROM:
Paris
 170+5 digits  171+5 digits  172+4 digits  173+5 digits  174+5 digits
 FROM:
Hong Kong
 170+5 digits
 171+5 digits  172+4 digits  173+5 digits  174+5 digits
 FROM:
Singapore
 170+5 digits  171+5 digits  172+4 digits  173+5 digits  174+5 digits
FROM:
New Delhi
 170+5 digits  171+5 digits  172+4 digits  173+5 digits  174+5 digits
FROM:
Beijing
Standard International Dialing
Standard International Dialing
Standard International Dialing
Standard International Dialing
Standard International Dialing

International Site Codes

 From/To International
 TO 165:
London
 TO 166:
Paris
 TO 176:
Hong Kong
 TO 164:
Singapore
 TO 178:
New Delhi
TO 163:
Beijing
 FROM:
Chicago Hyde Park Campus
 165+4 digits  PROPOSED-NOT IN SERVICE 166+3 digits  176+3 digits  164+4 digits  178+3 digits  Standard International Dialing
 FROM:
Chicago 401 N. Michigan
 165+4 digits  PROPOSED-NOT IN SERVICE 166+3 digits  176+3 digits  164+4 digits 178+3 digits
 Standard International Dialing
 FROM:
Chicago Gleacher
 165+4 digits  PROPOSED-NOT IN SERVICE 166+3 digits  176+3 digits  164+4 digits  178+3 digits  Standard International Dialing
 FROM:
Washington DC
 165+4 digits  PROPOSED-NOT IN SERVICE 166+3 digits  176+3 digits  164+4 digits  178+3 digits  Standard International Dialing
 FROM:
San Francisco
 165+4 digits  PROPOSED-NOT IN SERVICE  166+3 digits  176+3 digits  164+4 digits  Standard International Dialing
 FROM:
London
 5 digits  PROPOSED-NOT IN SERVICE 166+3 digits  176+3 digits  164+4 digits  178+3 digits  Standard International Dialing
 FROM:
Paris
 165+4 digits  3 digits  176+3 digits  164+4 digits  178+3 digits  Standard International Dialing
 FROM:
Hong Kong
 165+4 digits  PROPOSED-NOT IN SERVICE 166+3 digits  3 digits  164+4 digits  178+3 digits  Standard International Dialing
 FROM:
Singapore
 165+4 digits  PROPOSED-NOT IN SERVICE 166+3 digits  176+3 digits  4 digits  178+3 digits  Standard International Dialing
FROM:
New Delhi
 165+4 digits  PROPOSED-NOT IN SERVICE 166+3 digits  176+3 digits  164+4 digits  3 digits  Standard International Dialing
FROM:
Beijing
Standard International Dialing
Standard International Dialing
Standard International Dialing
Standard International Dialing
Standard International Dialing
local pattern

For example, London is assigned the site code 165. This means that all other U of C sites will dial 165 plus the last 4 digits of the desk phones in London to reach a London party. Conversely, calling from London to Chicago Hyde Park, one should call 170 xxxxx, where xxxxx are the last 5 digits of the campus numbers in Hyde Park. Please note that not all sites use 5 digit extensions, such as Gleacher, which uses four.




Keywords:liaison dialing call phone   Doc ID:59064
Owner:Kathy C.Group:University of Chicago
Created:2015-12-18 15:59 CSTUpdated:2016-12-12 07:04 CST
Sites:University of Chicago, University of Chicago - Sandbox
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