NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2012-05-03 | 623-299 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2012-04-24 | 516-743 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NASSAUZN05 | NY |
| 2012-04-24 | 646-582 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2012-04-23 | 571-581 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNGTNZN17 | VA |
| 2012-04-17 | 408-606 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS WEST | CA |
| 2012-04-17 | 469-249 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX |
| 2012-04-10 | 469-310 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX |
| 2012-04-10 | 864-315 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | GREENVILLE | SC |
| 2012-04-05 | 331-212 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | AURORA | IL |
| 2012-04-05 | 708-300 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | CHICAGOHTS | IL |
| 2012-04-03 | 615-988 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2012-04-02 | 804-887 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | RICHMOND | VA |
| 2012-04-02 | 832-619 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2012-03-30 | 585-441 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | ROCHESTER | NY |
| 2012-03-23 | 415-603 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNFC CNTRL | CA |
| 2012-03-22 | 415-590 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNFC CNTRL | CA |
| 2012-03-19 | 719-368 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | COLORDOSPG | CO |
| 2012-03-05 | 269-459 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | KALAMAZOO | MI |
| 2012-03-05 | 402-803 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SEWARD | NE |
| 2012-02-17 | 646-412 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2012-02-07 | 512-605 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | AUSTIN | TX |
| 2012-02-03 | 404-662 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | ATLANTA | GA |
| 2012-02-01 | 775-404 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV | 7376 | FERNLEY | NV |
| 2012-01-23 | 385-428 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MURRAY | UT |
| 2012-01-18 | 408-604 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SUNNYVALE | CA |
| 2012-01-09 | 502-909 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LOUISVILLE | KY |
| 2012-01-04 | 385-275 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MIDVALE | UT |
| 2011-12-23 | 929-221 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN06 | NY |
| 2011-12-09 | 812-203 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN | 7440 | PAOLI | IN |
| 2011-12-05 | 760-853 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | YUCCA VLY | CA |
| 2011-11-28 | 423-301 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | SO PITTSBG | TN |
| 2011-11-22 | 949-238 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SADLBK VLY | CA |
| 2011-11-09 | 206-641 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SEATTLE | WA |
| 2011-11-08 | 484-628 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | READING | PA |
| 2011-11-01 | 339-202 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEXINGTON | MA |
| 2011-10-28 | 469-262 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | IRVING | TX |
| 2011-10-24 | 443-931 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | BALTIMORE | MD |
| 2011-10-19 | 470-362 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | ATLANTA NE | GA |
| 2011-10-19 | 615-209 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2011-10-06 | 202-734 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN1 | DC |
| 2011-10-06 | 469-213 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRISCO | TX |
| 2011-10-04 | 623-282 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2011-09-28 | 434-329 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LYNCHBURG | VA |
| 2011-09-22 | 940-222 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENTON | TX |
| 2011-09-16 | 802-798 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | STOWE | VT |
| 2011-09-14 | 406-813 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BELGRADE | MT |
| 2011-09-13 | 408-620 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS SOUTH | CA |
| 2011-09-12 | 571-392 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HERNDON | VA |
| 2011-09-08 | 978-221 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LOWELL | MA |
| 2011-09-07 | 302-660 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - DE | 7220 | WILMINGTON | DE |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.