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What are CLLI codes?
A CLLI (Common Language Location Identification) Code is an eleven character alphanumeric descriptor used to identify switches, points of interconnection, and other categories of telephony network elements and their locations.
All CLLI codes are stored in a national database maintained by Telcordia.
Web-Based CLLI Code Lookup
If you know a CLLI Code, you can lookup what it refers to using the Telcodata.US CLLI Code Query.
Additional Information on CLLI Codes
For more information on CLLI Codes, visit Telcordia Technologies: Common Language Products.
Common Language is a registered trademark and CLLI is a trademark of Telcordia.
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