Prefix 215-391 — Philadelphia Zone 1, PA

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

Area code
215
Prefix (NXX)
391
Rate center
Philadelphia Zone 1
State
Pennsylvania
Time zone
Eastern
Code holder
BLOCK LINE SYSTEMS, LLC - PA
OCN
784E
Pooled
Yes (thousands-block pooling)
Assigned
2007-10-15
LATA
228

A phone number starting 215-391 was issued in the Philadelphia Zone 1 rate center of PA — part of area code 215.

NANPA's central-office code records list BLOCK LINE SYSTEMS, LLC - PA (OCN 784E) as the code holder, assigned October 15, 2007. Because 215-391 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

A scammer can display 215-391 without ever touching PA. When in doubt, end the call and reach the company or agency through its official website; unwanted robocalls belong in the FTC's fraud report queue.

Philadelphia Zone 1 is part of the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD Metropolitan Statistical Area. For routing purposes it sits in LATA 228. Numbers here keep Eastern time.

Neighboring prefixes

Prefixes adjacent to 215-391
PrefixRate centerCode holder
215-388 Philadelphia Zone 1 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA
215-389 Philadelphia Zone 1 VERIZON PENNSYLVANIA, INC.
215-390 Philadelphia Suburban Zone 33 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA
215-392 Philadelphia Suburban Zone 38 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA
215-393 Lansdale VERIZON PENNSYLVANIA, INC.
215-394 Philadelphia Suburban Zone 39 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA

FAQ

Where is 215-391 located?

The prefix is assigned to the Philadelphia Zone 1 rate center in PA, area code 215. It is part of the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD Metropolitan Statistical Area.

Which company owns 215-391 numbers?

BLOCK LINE SYSTEMS, LLC - PA 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 215-391 safe to answer?

The prefix itself says nothing about the caller. Legitimate Philadelphia Zone 1 businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.