Prefix 919-666 — Durham, NC

NANPA CO code assignment, current as of July 28, 2026.

Area code
919
Prefix (NXX)
666
Rate center
Durham
State
North Carolina
Time zone
Eastern
Code holder
LEVEL 3 COMMUNICATIONS, LLC - NC
OCN
3235
Pooled
Yes (thousands-block pooling)
Assigned
2010-10-04
LATA
426

The 919-666 prefix belongs to area code 919 and is anchored to the Durham rate center (NC). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

Durham is part of the Raleigh-Cary, NC Metropolitan Statistical Area. For routing purposes it sits in LATA 426. Numbers here keep Eastern time.

NANPA's central-office code records list LEVEL 3 COMMUNICATIONS, LLC - NC (OCN 3235) as the code holder, assigned October 4, 2010. Because 919-666 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

Caller ID showing 919-666 is not proof the call came from Durham: spoofing and porting both detach numbers from their origin. To verify a caller, hang up and dial the organization's published number, and report suspicious calls to the FTC.

Neighboring prefixes

Prefixes adjacent to 919-666
PrefixRate centerCode holder
919-663 Siler City BRIGHTSPEED OF EASTERN NORTH CAROLINA, LLC
919-664 Raleigh BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL
919-665 Raleigh ONVOY, LLC - NC
919-667 Durham FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC
919-668 Durham FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC
919-669 Raleigh SUNCOM DBA T-MOBILE USA

FAQ

Where is 919-666 located?

The prefix is assigned to the Durham rate center in NC, area code 919. It is part of the Raleigh-Cary, NC Metropolitan Statistical Area.

Which company owns 919-666 numbers?

LEVEL 3 COMMUNICATIONS, LLC - NC holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.

Is a call from 919-666 safe to answer?

The prefix itself says nothing about the caller. Legitimate Durham businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.