Exchange 437-253

Toronto, ON · Zayo Canada Inc. · OCN 8304. This is a numbering allocation fact, not subscriber identity.

Area code 437 · Toronto · Zayo Canada Inc.

Thousands ranges

437-253-0xxx · 437-253-1xxx · 437-253-2xxx · 437-253-3xxx · 437-253-4xxx · 437-253-5xxx · 437-253-6xxx · 437-253-7xxx · 437-253-8xxx · 437-253-9xxx