Local Routing Number (LRN)

Local Routing Number (LRN) is a unique 10-digit number used to identify a switch that holds ported or pooled numbers. Calls to ported or pooled numbers are routed based on the NPA-NXX of the number’s associated LRN. If a customer ports their number to another provider, the current telephone number can be retained and only the LRN needs to be changed.


How is Bandwidth Involved with LRN

When telephone numbers port over from another carrier, Bandwidth assigns an LRN to the number to ensure routing is correct.

What are the Benefits of LRN

Each carrier has at least one LRN per LATA. LRNs were created to provide local number portability by allowing numbers to route successfully when moved between carriers.


Where We Talk About LRN

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Terms Related to LRN


Learn More About Bandwidth’s Porting Services

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