tensorust/uls-license-transfers-feed-sample

Spectrum Assignment and Transfer Feed: free sample (Tensorust LLC)

Every FCC wireless assignment and transfer of control filed since 2021: who sold or handed over which call signs, to whom, and the status.

Headline: Spectrum changes hands through FCC Form 603 filings long before a deal shows up anywhere else, but ULS scatters them across files with no buyer-seller view.

This repository is a free teaser, not the dataset. It holds 25 example rows and a summary table with no names in it. The full file has 8,423 rows and is sold by Tensorust LLC: https://tensorust.com/datasets/uls-license-transfers-feed/.

Files here

file	what it is
sample.csv	25 rows of the full file (the same sample shown on tensorust.com)
summary_by_assignee_state.csv	row counts and totals by assignee state across the full file, no entity names (groups with fewer than 3 rows are folded into "Other")

Summary by assignee state (largest groups)

Assignee state	rows	Call signs
NY	1,029	5,478
TX	1,012	28,609
WA	730	25,626
VA	536	3,759
CA	518	2,607
FL	289	2,148
IL	289	3,497
CO	288	4,957
PA	273	2,094
GA	253	6,222
DC	253	41,698
OH	181	2,115
TOTAL	8,423	164,717

Full table: summary_by_assignee_state.csv.

What the full file has

• 8,423 rows
• Key fields: file_number, usi, purpose, purpose_code, status, receipt_date, receipt_year, assignor_or_transferor, assignor_frn, assignor_state
• Parquet and CSV, a README with sources, method and limits, and the build script
• Free 25-row sample (no personal contact data)

Coverage: 8,423 applications (5,261 assignments, 3,162 transfers of control) in all ULS wireless services that file Form 603; broadcast and satellite transactions are not in ULS. Weekly file Oct 31 2026 plus daily files through Nov 6 2026; latest receipt date 2026-11-04.

Columns in the full file

column	meaning
file_number	ULS application file number and system id
usi	ULS application file number and system id
purpose	Assignment of authorization (AA) or transfer of control (TC)
purpose_code	Assignment of authorization (AA) or transfer of control (TC)
status	Application status (Consummated, Granted, Accepted, Pending, Dismissed, Withdrawn...)
receipt_date	Date the FCC received the application
receipt_year	Date the FCC received the application
assignor_or_transferor	Seller side (individual licensees shown as (individual), no name)
assignor_frn	Seller side (individual licensees shown as (individual), no name)
assignor_state	Seller side (individual licensees shown as (individual), no name)
assignee_or_transferee	Buyer side
assignee_frn	Buyer side
assignee_state	Buyer side
n_call_signs	Call signs on the application
radio_services	Radio service codes of those call signs with counts
call_signs_first_50	Call signs on the application
assignor_org_id	Tensorust Ontology Organization matches
assignee_org_id	Tensorust Ontology Organization matches
source_file	ULS file the record came from

Get the full file

tier	price	includes
Transaction history file	$1,200	All 8,423 applications since 2021 with seller, buyer, FRNs, call signs, radio services and status. CSV and Excel.
Weekly deal feed	$6,000 a year	New and changed applications every week from the ULS daily files, status changes (accepted, consented to, consummated) flagged. Up to 5 users.
Platform license	$18,000 a year	Daily refresh, history back to 2010 rebuilt on request, and the right to load the feed into your CRM or deal tools.

Email mattbusel@tensorust.com with the tier and a billing contact, and we will send a proper invoice (ACH or card). The file is delivered once the invoice is paid. Details and the live sample: https://tensorust.com/datasets/uls-license-transfers-feed/. All datasets: https://tensorust.com/datasets/

Method and limits

Read AD application records with purpose AA or TC and receipt date on or after Jan 1 2021. Join EN records: R (assignor/transferor) and E (assignee/transferee); individuals are masked. Join CF call-sign records and look up each call sign's radio service. Daily files overwrite weekly records for the same application. Rerun weekly to keep the feed current; new rows are the diff.

Not deal prices: ULS does not carry consideration. Not legal advice. Applications where both sides are individuals are dropped; individuals on one side are shown as (individual).

Sources

• FCC ULS weekly complete assignments and transfers file a_aatc.zip (created Oct 31 2026), https://data.fcc.gov/download/pub/uls/complete/a_aatc.zip
• FCC ULS daily assignment and transfer files a_aa_sun to a_aa_sat, fetched Nov 6 2026, https://www.fcc.gov/uls/transactions/daily-weekly
• Call-sign radio services from the ULS license files (l_LMpriv.zip and others), https://data.fcc.gov/download/pub/uls/complete/
• Tensorust Ontology Organization objects

License

The sample and summary here are free to view, analyze and cite with attribution to "Tensorust LLC, https://tensorust.com/datasets/uls-license-transfers-feed/". The full dataset is licensed separately per tier. No resale or redistribution of Tensorust data without a written license.

Tensorust LLC, Tuckahoe NY. mattbusel@tensorust.com | https://tensorust.com