Prefix 215-921 — Philadelphia Zone 2, PA

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

Area code
215
Prefix (NXX)
921
Rate center
Philadelphia Zone 2
State
Pennsylvania
Time zone
Eastern
Code holder
COMCAST IP PHONE, LLC
OCN
318J
Pooled
Yes (thousands-block pooling)
Assigned
2007-06-13
LATA
228

Numbers in the 215-921 prefix are registered to the Philadelphia Zone 2 rate center in PA, inside area code 215. The prefix is the second block of a ten-digit US number (215-921-XXXX) and pins the number to a billing locality.

NANPA's central-office code records list COMCAST IP PHONE, LLC (OCN 318J) as the code holder, assigned June 13, 2007. Because 215-921 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

The rate center lies in the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD Metropolitan Statistical Area. The serving LATA is 228. Local time follows the Eastern zone.

Spoofing means this prefix on your screen doesn't guarantee a Philadelphia Zone 2 caller. Verify independently before trusting a request for money or data.

Neighboring prefixes

Prefixes adjacent to 215-921
PrefixRate centerCode holder
215-918 Philadelphia Suburban Zone 45 VERIZON PENNSYLVANIA, INC.
215-919 Philadelphia Suburban Zone 33 NEW CINGULAR WIRELESS PCS, LLC - DC
215-920 Philadelphia Suburban Zone 33 NEW CINGULAR WIRELESS PCS, LLC - DC
215-922 Philadelphia Zone 1 VERIZON PENNSYLVANIA, INC.
215-923 Philadelphia Zone 1 VERIZON PENNSYLVANIA, INC.
215-924 Philadelphia Zone 3 VERIZON PENNSYLVANIA, INC.

FAQ

Where is 215-921 located?

The prefix is assigned to the Philadelphia Zone 2 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 215-921 numbers?

COMCAST IP PHONE, LLC 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 215-921 safe to answer?

The prefix itself says nothing about the caller. Legitimate Philadelphia Zone 2 businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.