NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2022-01-04 620-574 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E FORD KS
2022-01-04 620-576 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E INGALLS KS
2022-01-04 620-578 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E MONTEZUMA KS
2022-01-04 620-579 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E SPEARVILLE KS
2022-01-04 681-406 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TERRA ALTA WV
2022-01-04 734-602 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J YPSILANTI MI
2022-01-04 769-372 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MERIDIAN MS
2022-01-04 769-376 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NATCHEZ MS
2022-01-04 769-378 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HATTIESBG MS
2022-01-04 810-303 0XXX1XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ALGONAC MI
2022-01-04 839-212 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWBERRY SC
2022-01-04 839-837 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ORANGEBURG SC
2022-01-04 947-245 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DRAYTON PL MI
2022-01-04 947-249 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HOLLY MI
2022-01-04 947-251 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J OXFORD MI
2022-01-04 947-257 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PONTIAC MI
2022-01-04 985-426 0–9 XXXall 10 · 8 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HOUMA LA
2021-12-30 225-472 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATONROUGE LA
2021-12-30 423-776 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PIKEVILLE TN
2021-12-30 559-809 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J VISALIA CA
2021-12-30 564-217 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LONGVIEW WA
2021-12-30 605-503 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J RAPID CITY SD
2021-12-30 618-814 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 EWING IL
2021-12-30 618-815 0XXX2XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J E ST LOUIS IL
2021-12-30 618-817 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 BELLEVILLE IL
2021-12-30 681-407 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LOGAN WV
2021-12-30 682-370 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J RENO TX
2021-12-30 712-406 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J COUNCILBLF IA
2021-12-30 737-587 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H AUSTIN TX
2021-12-30 816-530 0XXX1XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SMITHVILLE MO
2021-12-30 862-882 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 PASSAIC NJ
2021-12-30 970-902 0–9 XXXall 10 · 7 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J GRAND JCT CO
2021-12-30 971-422 0XXX1XXX2XXX4XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F VERNONIA OR
2021-12-29 228-279 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J GULFPORT MS
2021-12-29 229-593 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CUTHBERT GA
2021-12-29 234-343 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MEDINA OH
2021-12-29 319-410 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → AUREON COMMUNICATIONS, LLC 444G OELWEIN IA
2021-12-29 331-280 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DOWNERSGRV IL
2021-12-29 332-263 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN01 NY
2021-12-29 332-388 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 NWYRCYZN01 NY
2021-12-29 346-537 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HOUSTON TX
2021-12-29 361-285 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J C CHRISTI TX
2021-12-29 380-242 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C COLUMBUS OH
2021-12-29 413-468 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2021-12-29 413-469 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHRSTFKLN MA
2021-12-29 423-749 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 COLLEGEDL TN
2021-12-29 434-323 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 SO BOSTON VA
2021-12-29 458-263 0XXX1XXX2XXX3XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F SILVERLAKE OR
2021-12-29 504-396 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J NEWORLEANS LA
2021-12-29 507-810 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 MANKATO MN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.