NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2010-04-02 765-402 not yet reported which blocks → COMCAST IP PHONE, LLC 318J ROMNEY IN
2010-04-02 765-408 not yet reported which blocks → COMCAST IP PHONE, LLC 318J TIPTON IN
2010-04-02 779-221 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC 224C ROCKFORD IL
2010-04-02 989-702 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C SAGINAW MI
2010-04-01 202-650 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2010-04-01 214-937 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FRISCO TX
2010-04-01 423-414 0–9 XXXall 10 · 6 holders which blocks → PEACE COMMUNICATIONS, LLC - TN 967F CHATTNOOGA TN
2010-04-01 507-574 1XXX2XXX3XXX4XXX5XXX7XXX · 2 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F ADAMS MN
2010-04-01 507-578 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F BUTTERFLD MN
2010-04-01 507-579 0XXX1XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F TYLER MN
2010-04-01 507-687 1XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F IVANHOE MN
2010-04-01 727-282 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2010-04-01 786-254 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C MIAMI FL
2010-04-01 807-631 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Thunder Bay —
2010-03-31 201-744 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NJ 637C JERSEYCITY NJ
2010-03-31 408-673 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNJS WEST CA
2010-03-31 507-496 1XXX7XXX · 2 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F SPRINGFLD MN
2010-03-31 507-566 1XXX6XXX7XXX · 3 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F WINNEBAGO MN
2010-03-31 507-610 0XXX1XXX2XXX4XXX6XXX7XXX · 6 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F LAFAYETTE MN
2010-03-31 507-679 1XXX4XXX · 2 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F WELLS MN
2010-03-31 507-682 1XXX3XXX5XXX7XXX8XXX · 4 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F JANESVILLE MN
2010-03-31 507-745 1XXX which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F WINTHROP MN
2010-03-31 507-748 0XXX1XXX3XXX6XXX7XXX8XXX · 6 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F FULDA MN
2010-03-31 507-797 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F GIBBON MN
2010-03-31 507-818 1XXX8XXX · 2 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F FRANKLIN MN
2010-03-30 204-493 not yet reported which blocks → Fido Solutions Inc. 5643 Winkler —
2010-03-30 304-350 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MARTINSBG WV
2010-03-30 304-666 0–9 XXXall 10 · 5 holders which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - WV 423C WEST UNION WV
2010-03-30 336-559 0–9 XXXall 10 · 5 holders which blocks → BRIGHTSPEED OF NORTH CAROLINA, LLC 0471 ELKIN NC
2010-03-30 347-316 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NWYRCYZN03 NY
2010-03-30 408-659 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 MORGANHILL CA
2010-03-30 507-564 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F CHATFIELD MN
2010-03-30 507-616 0–9 XXXall 10 · 8 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F REDWOODFLS MN
2010-03-30 613-700 not yet reported which blocks → Videotron Ltd. 383F Ottawa-Hull —
2010-03-30 671-997 not yet reported which blocks → PTI PACIFICA INC. 387C AGANA GU
2010-03-30 671-998 not yet reported which blocks → PTI PACIFICA INC. 387C AGANA GU
2010-03-30 709-304 not yet reported which blocks → Bell Mobility Aliant 329A Twillingate —
2010-03-30 720-754 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF COLORADO, LLC - CO 4574 DENVER CO
2010-03-30 801-903 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-29 269-993 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 KALAMAZOO MI
2010-03-29 301-400 0–9 XXXwhole prefix which blocks → VERIZON MARYLAND, INC. 9212 WSHNGTNZN2 MD
2010-03-29 317-759 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IN 097D INDIANAPLS IN
2010-03-29 517-240 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 JACKSON MI
2010-03-29 574-367 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - IN 097D SOUTH BEND IN
2010-03-29 603-510 0XXX which blocks → COMCAST IP PHONE, LLC 318J MERIDEN NH
2010-03-29 810-620 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
2010-03-29 970-578 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J JOHNSTMLKN CO
2010-03-26 204-465 not yet reported which blocks → Fido Solutions Inc. 5643 Roblin —
2010-03-26 204-490 not yet reported which blocks → Fido Solutions Inc. 5643 Stonewall —
2010-03-26 204-491 not yet reported which blocks → Fido Solutions Inc. 5643 Virden —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.