Prefix 313-217 — Detroit Zone 02, MI

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

Area code
313
Prefix (NXX)
217
Rate center
Detroit Zone 02
State
Michigan
Time zone
Eastern
Code holder
BANDWIDTH.COM CLEC, LLC - MI
OCN
991E
Pooled
Yes (thousands-block pooling)
Assigned
2018-07-11
LATA
340

A phone number starting 313-217 was issued in the Detroit Zone 02 rate center of MI — part of area code 313.

The assigned code holder is BANDWIDTH.COM CLEC, LLC - MI, operating company number 991E, assigned July 11, 2018. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.

A scammer can display 313-217 without ever touching MI. 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.

Detroit Zone 02 is part of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area. For routing purposes it sits in LATA 340. Numbers here keep Eastern time.

Neighboring prefixes

Prefixes adjacent to 313-217
PrefixRate centerCode holder
313-214 Detroit Zone 05 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
313-215 Detroit Zone 05 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
313-216 Detroit Zone 06 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI
313-218 Detroit Zone 05 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
313-219 Detroit Zone 05 SPOK, INC.
313-220 Detroit Zone 05 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC

FAQ

Where is 313-217 located?

The prefix is assigned to the Detroit Zone 02 rate center in MI, area code 313. It is part of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area.

Which company owns 313-217 numbers?

BANDWIDTH.COM CLEC, LLC - MI 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 313-217 safe to answer?

The prefix itself says nothing about the caller. Legitimate Detroit Zone 02 businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.