About NewLocalNumbers.com

What is an OCN?

An OCN (Operating Company Number) is a four-character ID assigned to every carrier that issues phone numbers in North America. Verizon, AT&T, T-Mobile, your local CLEC, your VoIP provider. They all have OCNs. When a customer signs up, the carrier draws a number from one of its assigned NXX blocks and gives it to them.

Why does the originating carrier matter?

If you're trying to find out who controls a phone number. To buy it, to reach the owner, or just to track it down. Knowing the carrier that first issued the block is a great starting point. It tells you which company likely set up the customer originally, and roughly when.

How do I read the result?

• Recent: block was issued in the last 18 months. The carrier most likely still owns it. Call them.
• Medium: issued 18–36 months ago. Customers do switch carriers, but it's still worth a call.
• Old: issued more than 36 months ago. The number has probably changed hands several times. Don't bother contacting the original carrier; just call the number directly.

Where does the data come from?

NXX block assignments are public administrative records. We pull from the same NANPA / iconectiv-derived feeds used industry-wide, then layer on carrier metadata (addresses, holdings, websites) from PlatinumWire. Snapshot rebuilt 2026-05-08.

Can the 18-month threshold be wrong?

Sometimes. Different carriers cycle inventory at different speeds. We're working on per-carrier dynamic windows. For now, treat the tier as a guide, not a guarantee.

Carrier-type abbreviations

You'll see these short codes in our directory. Here's what each one means:

• CLEC. Competitive Local Exchange Carrier
• ILEC. Incumbent Local Exchange Carrier
• ULEC. Underlying Local Exchange Carrier
• RBOC. Regional Bell Operating Company
• IXC. Interexchange (long-distance) Carrier
• IPES. IP-Enabled Service / VoIP
• WIRELESS. Wireless Carrier
• PCS. Personal Communications Service (Wireless)
• PCSR. PCS Reseller
• WRSL. Wireless Reseller
• LRSL. Local Reseller
• CAP. Competitive Access Provider
• ETHX. Ethernet Exchange Carrier
• INTL. International Carrier
• GENERAL. Administrative / Reserved

Sister sites

resporgs.com for toll-free RespOrg directories. vanitynumbers.com for vanity local + toll-free number search. tollfreenumbers.com for toll-free.