Following are Location Routing Number (LRN) data requirements for the Routing Data Base System (RDBS).

• • • • • • • New LRN All items are required unless otherwise noted.

              Data change Items 1-3 are required, as are the appropriate element(s) to be changed.

              Disconnect Only items 1-3 should be provided.

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• • • • • • • • • • • 1. LRN ______________ Location Routing Number (LRN) associated with a given switching entity/POI

                      2. STATUS ______________ E = newly established LRN, M = change to supporting data D = disconnect of an LRN

                      3. EFF DATE ____/____/____ Date the LRN can first be routed to, date supporting data change will be effective or, date of disconnect (mm/dd/yy)

                      4. LRN TYPE ______________ Used to indicate the general purpose for the LRN Identifies use. Primary (P) would be used for the initial LRN for a switching entity/POI. Maintenance (M) may be used for other LRNs for a switching entity/POI.

                      5. Switch ______________ A valid switch code (e.g. CLLI Ô ) should be entered.

                      6. LATA Served ______________ Local Access Transport Area code (3 digits, 5 may apply in Florida) that to which the LRN is associated

                    10. OCN ______________ Operating Company Number

The following is optional and relates to data requested on Part 2, Form 4 :

• • • • • • • • • • • 11. RATE CENTER ______________ Identifies the exchange rate center served by the thousands block (NXX-X) (Maximum of 10 characters)

                      12. RC TYPE ______________ If applicable, enter an indicator for the type of rate center (Choose one - S, Z, /, +)

                      13. RC STATE ______________ Enter a two character code for the state or territory of the Rate Center.