NRNumberResearch Membership · Data 09/17/2026

← Area code 773

MCIMETRO ACCESS TRANSMISSION SERVICES LLC

38 prefixes in 773 · initial assignments from the NANPA CO code file, 09/17/2026

Prefixes held by MCIMETRO ACCESS TRANSMISSION SERVICES LLC in area code 773
NPA-NXXRate centerOCNAssignedPooled
773-243 CHICGOZN03 7229 — Yes
773-250 CHICGOZN02 7229 — Yes
773-272 CHICGOZN03 7229 — Yes
773-289 CHICGOZN04 7229 — Yes
773-295 CHICGOZN05 7229 — Yes
773-299 CHICGOZN06 7229 — Yes
773-303 CHICGOZN02 7229 — Yes
773-304 CHICGOZN03 7229 — Yes
773-305 CHICGOZN04 7229 — Yes
773-313 CHICGOZN02 7229 — Yes
773-314 CHICGOZN03 7229 — Yes
773-337 CHICGOZN11 7229 — Yes
773-344 CHICGOZN10 7229 — Yes
773-345 CHICGOZN05 7229 — Yes
773-346 CHICGOZN06 7229 — Yes
773-347 CHICGOZN07 7229 — Yes
773-349 CHICGOZN08 7229 — Yes
773-358 CHICGOZN07 7229 — Yes
773-359 CHICGOZN09 7229 — Yes
773-365 CHICGOZN04 7229 — Yes
773-423 CHICGOZN02 7229 — Yes
773-435 CHICGOZN04 7229 — Yes
773-453 CHICGOZN11 7229 — Yes
773-466 CHICGOZN05 7229 — Yes
773-470 CHICGOZN08 7229 — Yes
773-681 CHICGOZN02 7229 — Yes
773-751 CHICGOZN02 7229 — Yes
773-756 CHICGOZN03 7229 — Yes
773-787 CHICGOZN10 7229 — Yes
773-799 CHICGOZN04 7229 — Yes
773-830 CHICGOZN05 7229 — Yes
773-887 CHICGOZN05 7229 — Yes
773-893 CHICGOZN06 7229 — Yes
773-896 CHICGOZN07 7229 — Yes
773-948 CHICGOZN08 7229 — Yes
773-967 CHICGOZN09 7229 — Yes
773-981 CHICGOZN10 7229 — Yes
773-985 CHICGOZN11 7229 — Yes

These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.