NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 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 19
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
2020-10-22 253-553 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WA 483E AUBURN WA
2020-10-22 308-475 2XXX4XXX9XXX · 2 holders which blocks → PINPOINT COMMUNICATIONS, INC. - NE 2309 ORLEANS NE
2020-10-22 308-798 2XXX7XXX9XXX · 2 holders which blocks → PINPOINT COMMUNICATIONS, INC. - NE 2309 REPUBLCNCY NE
2020-10-22 308-869 2XXX8XXX9XXX · 2 holders which blocks → PINPOINT COMMUNICATIONS, INC. - NE 2309 STAMFORD NE
2020-10-22 308-929 0XXX4XXX5XXX9XXX · 3 holders which blocks → PINPOINT COMMUNICATIONS, INC. - NE 2309 ALMA NE
2020-10-22 413-381 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J SPRINGFLD MA
2020-10-22 417-610 0XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - MO 093F COLLINS MO
2020-10-22 425-470 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 EVERETT WA
2020-10-22 437-392 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-10-22 470-693 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 ATLANTA GA
2020-10-22 507-741 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 AUSTIN MN
2020-10-22 507-742 4XXX8XXX9XXX · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J ROCHESTER MN
2020-10-22 520-501 0–9 XXXall 10 · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J TUCSON AZ
2020-10-22 531-895 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J OMAHA NE
2020-10-22 559-557 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2020-10-22 564-544 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E ABERDEEN WA
2020-10-22 564-546 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E BELFAIR WA
2020-10-22 564-654 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WA 483E BREMERTON WA
2020-10-22 567-332 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OH 464C FINDLAY OH
2020-10-22 619-845 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2020-10-22 659-209 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALABASTER AL
2020-10-22 701-707 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J FARGO ND
2020-10-22 719-895 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J COLORDOSPG CO
2020-10-22 740-784 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 NEWARK OH
2020-10-22 743-244 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 YANCEYVL NC
2020-10-22 814-971 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 ST MARYS PA
2020-10-22 825-457 not yet reported which blocks → Bell Mobility 6574 Calgary —
2020-10-22 928-538 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AZ 630E BULLHEADCY AZ
2020-10-22 980-983 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H PEACHLPKTN NC
2020-10-22 984-849 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NC 638E APEX NC
2020-10-22 986-895 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BOISE ID
2020-10-21 208-563 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOISE ID
2020-10-21 331-271 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C HINSDALE IL
2020-10-21 725-255 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NV 029F SANDY VLY NV
2020-10-21 904-603 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 JACKSONVL FL
2020-10-20 253-361 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2020-10-20 253-368 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 AUBURN WA
2020-10-20 365-350 not yet reported which blocks → IXICA Communications Inc. 812H Fort Erie —
2020-10-20 515-895 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J DES MOINES IA
2020-10-20 517-261 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRANDLEDGE MI
2020-10-20 573-993 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MO 093F CLARKSVL MO
2020-10-20 765-514 0XXX1XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → ONVOY, LLC - IN 097D ROSSVILLE IN
2020-10-20 765-604 1XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → ONVOY, LLC - IN 097D LAPEL IN
2020-10-20 782-444 not yet reported which blocks → IXICA Communications Inc. 812H Halifax —
2020-10-20 782-666 not yet reported which blocks → IXICA Communications Inc. 812H Halifax —
2020-10-20 810-204 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C PORT HURON MI
2020-10-20 912-612 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D FOLKSTON GA
2020-10-20 920-518 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 DE PERE WI
2020-10-20 930-219 0XXX1XXX2XXX4XXX5XXX8XXX · 2 holders which blocks → ONVOY, LLC - IN 097D DILLSBORO IN
2020-10-20 930-224 0XXX1XXX2XXX4XXX5XXX · 4 holders which blocks → ONVOY, LLC - IN 097D PATRIOT IN

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.