OCN (Operating Company Number) is a 4-character identifier assigned by NECA that uniquely identifies each telecommunications carrier. OCN is more reliable than carrier names for programmatic carrier identification because names can vary in formatting.
OCN Format
OCNs are exactly 4 characters, alphanumeric. Examples:
- 6006 — Verizon Wireless
- 6529 — T-Mobile
- 6664 — AT&T Mobility
Why Use OCN
Carrier names vary in formatting ("Verizon Wireless" vs "Verizon"). OCN is consistent and ideal for:
- Routing logic
- Rate table lookups
- Analytics and reporting