NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

11 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 573
INTRADO COMMUNICATIONS, LLC 4
ONVOY, LLC - MO 2
BANDWIDTH.COM CLEC, LLC - MO 2
EXIANT COMMUNICATIONS LLC 1
E. RITTER COMMUNICATIONS, LLC 1
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2022-03-23 573-670-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2022-03-23 573-670-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2022-03-23 573-670-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2022-03-23 573-670-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2022-03-23 573-670-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2022-03-23 573-713-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2022-03-21 573-224-8XXX 8000–8999Assigned TELNYX LLC 073H GREENVILLE MO
2022-03-10 573-625-5XXX 5000–5999Assigned TERRA NOVA TELECOM INC. 145J DEXTER MO
2022-03-10 573-946-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 POCAHONTAS MO
2022-03-09 573-208-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 MARBLEHILL MO
2022-03-09 573-606-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 JEFFERSNCY MO
2022-03-09 573-707-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 DONIPHAN MO
2022-03-02 573-534-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J BONNETERRE MO
2022-03-02 573-618-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARBLEHILL MO
2022-02-14 573-895-2XXX 2000–2999Assigned TERRA NOVA TELECOM INC. 145J BLOOMFIELD MO
2022-02-14 573-932-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J CAMDENTON MO
2022-02-07 573-297-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F WAPPAPLLPK MO
2022-01-28 573-670-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2022-01-28 573-670-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2022-01-28 573-670-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2022-01-28 573-969-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CENTRALIA MO
2022-01-28 573-982-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CENTRALIA MO
2022-01-26 573-362-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E FISK MO
2022-01-25 573-410-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAMDENTON MO
2022-01-25 573-463-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E BUNKER MO
2022-01-25 573-618-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F MARBLEHILL MO
2022-01-25 573-921-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E EWING MO
2022-01-24 573-237-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J NEW HAVEN MO
2022-01-24 573-843-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E CARUTHRSVL MO
2022-01-14 573-916-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J CHERRYVL MO
2022-01-13 573-540-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 COLUMBIA MO
2022-01-13 573-926-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LOUISIANA MO
2022-01-12 573-532-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F DONIPHAN MO
2022-01-06 573-536-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TAOS MO
2022-01-06 573-713-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F FARMINGTON MO
2022-01-06 573-910-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F FARMINGTON MO
2021-12-30 573-266-4XXX 4000–4999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F OAK RIDGE MO
2021-12-15 573-910-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2021-12-15 573-910-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2021-12-15 573-910-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2021-12-15 573-910-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2021-12-13 573-537-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ROLLA MO
2021-12-13 573-537-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ROLLA MO
2021-12-13 573-537-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ROLLA MO
2021-12-13 573-537-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ROLLA MO
2021-12-13 573-537-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ROLLA MO
2021-12-07 573-391-2XXX 2000–2999Assigned TERRA NOVA TELECOM INC. 145J PORTAGEVL MO
2021-12-07 573-650-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E POTOSI MO
2021-12-07 573-866-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J PATTON MO
2021-12-02 573-208-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F MARBLEHILL MO

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.