Property, People and B2B Data Glossary

Absentee owner: A property owner whose mailing address on the assessor roll differs from the property address. A common investor and marketing filter, and a rough proxy for a rental.
ADR (average daily rate): In short-term rental data, the average nightly price of booked nights over a period, excluding cleaning and service fees.
Append: Adding fields to a file you already have by matching each record to a reference dataset. An owner append adds the owner to an address; a phone append adds a phone to a name and address.
APN (assessor's parcel number): The identifier a county assessor assigns to a parcel. Formats vary by county, so national files add their own stable parcel key on top of it.
Assessed value: The value a county assessor assigns to a parcel for tax purposes. Often a fraction of market value by statute and not comparable across states.
Assessor file: The county roll of parcels with owner, address, land use, structure characteristics and values, maintained for property taxation.
AVM (automated valuation model): A statistical model that estimates a property's market value from sales, characteristics and market conditions without an inspection.
Batch append: An append run on a whole file at once, as opposed to a single-record API lookup.
Bulk license: A license to receive an entire dataset as files, refreshed on a schedule, rather than access to look records up.
Cadence: How often a dataset is refreshed: daily, weekly, monthly or quarterly. Stated per dataset.
CASS: The Postal Service's certification for address standardization software. Mail-ready files have been run through it.
CBSA: Core-based statistical area, the federal definition of a metro or micro area. Used to roll ZIP and county data up to a market.
Comparable sale (comp): A recent sale of a similar nearby property used as evidence for a valuation.
Confidence score: A model's or matcher's own estimate of how reliable a particular output is. Used to route records to automated or manual handling.
Data dictionary: The document that ships with a file listing every field, its type, its source and its fill rate.
Deed: The recorded document that transfers ownership of real property. The basis of transaction data.
Delta file: A refresh that contains only the records that changed since the previous delivery, with the change type flagged.
Deliverability: Whether an email address will accept mail, checked by SMTP verification rather than by format alone.
Distressed property: A property with a public-record signal of financial stress: pre-foreclosure filing, tax lien, delinquency or similar.
DNC (Do Not Call): The federal registry and state lists of numbers that may not be called for telemarketing. A scrub removes or flags them.
Expired listing: A listing whose agreement ended without a sale. A daily signal used by investors and agents.
Fill rate: The share of records in which a field is populated. Meaningless without the denominator being stated.
Firmographics: Descriptive attributes of a company: industry, size, revenue band, location, founding year.
FSBO: For sale by owner. A property marketed without a listing agent, often found off the main portals.
HELOC: Home equity line of credit, recorded as a lien. An event signal for lenders and home-services marketers.
Hashed audience: A list of identifiers, usually emails or phones, one-way hashed before upload to an ad platform so the raw values are never exposed.
Identity resolution: Determining that records in different files refer to the same person, property or company, and assigning a shared key.
Land use code: The assessor's classification of a parcel: single family, condo, commercial, vacant and so on. Residential is the usual denominator for fill rates.
License status: The regulator's current standing for a license: active, inactive, expired, suspended and other state-specific values.
Line type: Whether a phone number is currently wireless, wireline or VoIP, determined from the portability database rather than the original block.
Lis pendens: A recorded notice that litigation affecting a property is pending, commonly the first public step of a foreclosure.
Litigator scrub: Removing or flagging numbers known to belong to people who have sued under telemarketing law.
Match rate: The share of records in a file that were successfully matched to the reference data. Reported per field on our match report.
MCP (Model Context Protocol): A standard that lets AI assistants call external tools. Our license, owner, comps and phone lookups are exposed as MCP tools on an early-access basis.
Mover: A person or household with a recent change of address, detected from postal, consumer and property signals.
NCOA: National Change of Address, the Postal Service's move database used to update mailing files.
Occupancy (STR): The share of available nights that were booked over a period, estimated from calendar observations.
On-market: A property with an active listing for sale or rent. Used on this site in place of references to any specific listing service.
Owner-occupied: A parcel whose owner mailing address matches the property address, taken as evidence the owner lives there.
Parcel key: The stable identifier that joins assessor, recorder, mortgage, permit, listing and valuation records for one property.
Permit: A jurisdiction's authorization for construction work on a property, recorded with type, value, dates and often the contractor.
Point-in-time: Data that preserves what was known on each past date, with both the event date and the observation date on every row.
Pre-foreclosure: The period after a default notice or lis pendens is recorded and before the property is sold at auction or reinstated.
Probate lead: A property whose owner has died, identified from obituaries or court filings and linked to the parcel and heirs.
Recorder file: The county index of recorded documents: deeds, mortgages, releases, liens and notices.
RevPAR: Revenue per available night, the product of occupancy and average daily rate. A hospitality metric applied to short-term rentals.
Skip trace: Locating current contact information for a named person, typically an owner, from consumer and carrier data.
SMTP verification: Checking with the receiving mail server whether an address exists, without sending a message.
Suppression: Removing records from a marketing file that should not be contacted: listed, sold, vacant, deceased, moved or on a do-not-contact list.
Strict cut: A phone file limited to records where the subscriber name matches the target name exactly, as opposed to a wide cut that allows a household match.
Vacancy signal: Evidence that a property is unoccupied, from postal, utility and listing indicators, expressed as a score.
VIN: Vehicle identification number. Encodes make, model and model year, and links a vehicle to registration and ownership data.
X-date: The date an insurance policy expires and renews. Derived for home policies from the recorded purchase date.
ZCTA: ZIP Code Tabulation Area, the Census Bureau's polygon approximation of a ZIP code. Not the same as the postal ZIP.

Glossary.