NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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, all time — NPA 840
T-MOBILE USA, INC. 32
FRACTEL, LLC 26
ONVOY, LLC - CA 22
NEW CINGULAR WIRELESS PCS, LLC 17
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 12
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
2023-10-18 840-245 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 REDLANDS CA
2023-10-16 840-244 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 DIAMONDBAR CA
2023-10-16 840-284 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C CHINO CA
2023-10-10 840-243 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 POMONA CA
2023-10-02 840-239 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C FONTANA CA
2023-10-02 840-241 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C RIALTO CA
2023-10-02 840-242 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C UPLAND CA
2023-09-26 840-238 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2023-09-19 840-236 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C CLAREMONT CA
2023-09-19 840-237 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C ONTARIO CA
2023-08-11 840-235 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H COLTON CA
2023-07-13 840-233 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARROWHEAD CA
2023-06-09 840-232 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 FONTANA CA
2023-05-31 840-231 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 POMONA CA
2023-05-30 840-230 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J POMONA CA
2023-04-18 840-229 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CLAREMONT CA
2023-04-17 840-228 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 COLTON CA
2023-04-13 840-227 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2023-04-07 840-226 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C POMONA CA
2023-03-10 840-225 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2023-01-13 840-804 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C CLAREMONT CA
2022-12-06 840-224 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 S BERNDINO CA
2022-11-18 840-240 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C DIAMONDBAR CA
2022-10-24 840-223 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CALIMESA CA
2022-10-21 840-221 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J S BERNDINO CA
2022-10-10 840-218 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHINO CA
2022-09-13 840-220 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RIALTO CA
2022-09-02 840-217 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 FONTANA CA
2022-08-12 840-213 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 REDLANDS CA
2022-08-12 840-214 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MARSHALL CA
2022-03-01 840-216 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARROWHEAD CA
2022-02-28 840-215 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HIGHLAND CA
2022-02-28 840-252 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MENTONE CA
2022-02-23 840-587 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H S BERNDINO CA
2022-02-22 840-208 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CLAREMONT CA
2022-02-18 840-336 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H COLTON CA
2022-02-18 840-356 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ARROWHEAD CA
2022-02-18 840-466 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J UPLAND CA
2022-01-27 840-500 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BIGBEAR CY CA
2022-01-10 840-837 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J POMONA CA
2021-12-14 840-210 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 FONTANA CA
2021-11-15 840-212 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHINO CA
2021-10-28 840-207 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARROWHEAD CA
2021-10-28 840-588 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H DIAMONDBAR CA
2021-10-28 840-677 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ETIWANDA CA
2021-10-27 840-205 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CLAREMONT CA
2021-10-25 840-688 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CRESTLINE CA
2021-09-13 840-219 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CALIMESA CA
2021-08-31 840-209 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARROWHEAD CA
2021-08-10 840-206 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHINO CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.