Data sources
Where Landlines gets its data
Every parcel boundary and every piece of public-record property information in Landlines (owner name, mailing address, and last-sale figures where a government source publishes them) comes from official government open-data sources: state GIS clearinghouses, county and municipal GIS programs, and county property appraiser / assessor offices. This information is public record, published by those agencies under state open-records laws. Landlines does not create, alter, or certify boundaries — it displays what the source agency publishes.
Inside the app, every parcel’s detail sheet names the exact government source it came from (a “Data source” credit), so you can always see which agency published the record you are viewing. The list below shows the primary official government source for each state, with a link to that agency’s public site. Coverage is expanding continuously.
| State / territory | Primary government source | Official link |
|---|---|---|
| Alabama | Alabama Department of Revenue & county revenue commissioners | Official site ↗ |
| Alaska | Alaska Statewide Parcels — University of Alaska Anchorage Geomatics compilation of borough & city assessor data (via ArcGIS Online) | Official site ↗ |
| Arizona | AZGeo Data Hub (State of Arizona) | Official site ↗ |
| Arkansas | Arkansas GIS Office | Official site ↗ |
| California | Specific counties only (not statewide) — county GIS / assessor offices (see California detail below) | See detail below ↓ |
| Colorado | Colorado Geospatial (OIT) & county assessors | Official site ↗ |
| Connecticut | Connecticut GIS Office (OPM) | Official site ↗ |
| Delaware | Delaware FirstMap | Official site ↗ |
| District of Columbia | Open Data DC (Office of the Chief Technology Officer) | Official site ↗ |
| Florida | Florida Department of Revenue & county property appraisers | Official site ↗ |
| Georgia | Specific counties only (not statewide) — county assessor / GIS offices & regional commissions (see Georgia detail below) | See detail below ↓ |
| Hawaii | Hawaii Statewide GIS Program | Official site ↗ |
| Idaho | Idaho GIS (State of Idaho) | Official site ↗ |
| Illinois | Specific counties only (not statewide) — county GIS / assessor offices (see Illinois detail below) | See detail below ↓ |
| Indiana | Indiana Geographic Information Office | Official site ↗ |
| Iowa | Iowa Geospatial Data | Official site ↗ |
| Kansas | Kansas Data Access & Support Center (DASC) & county appraisers | Official site ↗ |
| Kentucky | Kentucky Geography Network & county PVA offices | Official site ↗ |
| Louisiana | Louisiana Tax Commission & parish assessors | Official site ↗ |
| Maine | Maine GeoLibrary | Official site ↗ |
| Maryland | Maryland Department of Planning / SDAT — statewide parcel boundaries (MD iMAP) | Official site ↗ |
| Massachusetts | MassGIS (Commonwealth of Massachusetts) | Official site ↗ |
| Michigan | State of Michigan GIS Open Data & county equalization | Official site ↗ |
| Minnesota | Minnesota Geospatial Commons | Official site ↗ |
| Mississippi | Mississippi Automated Resource Information System (MARIS) — statewide cadastral service | Official site ↗ |
| Missouri | Missouri Spatial Data Information Service (MSDIS) & county assessors | Official site ↗ |
| Montana | Montana State Library | Official site ↗ |
| Nebraska | NebraskaMAP | Official site ↗ |
| Nevada | Nevada Division of Water Resources & county assessors | Official site ↗ |
| New Hampshire | NH GRANIT (University of New Hampshire) | Official site ↗ |
| New Jersey | New Jersey Office of GIS (NJGIN) open-data portal | Official site ↗ |
| New Mexico | New Mexico Office of the State Engineer — County Parcels GIS service (with county assessors) | Official site ↗ |
| New York | New York State GIS Program Office — NYS GIS Clearinghouse | Official site ↗ |
| North Carolina | NC OneMap (NC Center for Geographic Information & Analysis) | Official site ↗ |
| North Dakota | North Dakota GIS Hub | Official site ↗ |
| Ohio | Ohio Geographically Referenced Information Program (OGRIP) — GeoHio open-data hub | Official site ↗ |
| Oklahoma | State of Oklahoma & county assessors | Official site ↗ |
| Oregon | Oregon Geospatial Enterprise Office & county assessors | Official site ↗ |
| Pennsylvania | Pennsylvania Spatial Data Access (PASDA) — Pennsylvania's official geospatial data clearinghouse, operated for the Commonwealth by Penn State | Official site ↗ |
| Rhode Island | Rhode Island GIS (RIGIS) | Official site ↗ |
| South Carolina | SC Revenue & Fiscal Affairs (GIS) & county assessors | Official site ↗ |
| South Dakota | Specific counties & municipalities only (not statewide) — Minnehaha County, City of Sioux Falls & Pennington County, via local directors of equalization / GIS | See detail below ↓ |
| Tennessee | TNMap (State of Tennessee GIS) & county assessors | Official site ↗ |
| Texas | Texas Geographic Information Office (TxGIO) | Official site ↗ |
| Utah | Utah Geospatial Resource Center (UGRC) | Official site ↗ |
| Vermont | Vermont Center for Geographic Information (VCGI) | Official site ↗ |
| Virginia | Virginia Geographic Information Network (VGIN) | Official site ↗ |
| Washington | Washington State Department of Revenue & county assessors | Official site ↗ |
| West Virginia | WV GIS Technical Center (West Virginia University) | Official site ↗ |
| Wisconsin | Wisconsin State Cartographer’s Office / DOA | Official site ↗ |
| Wyoming | Wyoming Department of Revenue | Official site ↗ |
New Mexico — county sources
New Mexico parcel data is published by the New Mexico Office of the State Engineer (in cooperation with county assessors), covering the following counties: Bernalillo (Albuquerque), Catron, Chaves (Roswell), Cibola, Colfax, Curry (Clovis), De Baca, Doña Ana (Las Cruces), Eddy (Carlsbad), Grant (Silver City), Guadalupe, Harding, Hidalgo, Lea (Hobbs), Lincoln (Ruidoso), Los Alamos, Luna (Deming), McKinley (Gallup), Mora, Otero (Alamogordo), Quay (Tucumcari), Rio Arriba, Roosevelt (Portales), Sandoval, San Juan (Farmington), San Miguel (Las Vegas), Santa Fe, Sierra, Socorro, Taos, Torrance, Union (Clayton), and Valencia.
Arizona — county sources
In Arizona, only parcel boundaries and parcel numbers are shown (no owner names or mailing addresses), in keeping with Arizona public-records restrictions on the commercial use of owner information. Several Arizona county layers are served through the AZGeo Data Hub (State of Arizona) shared parcel services.
- Maricopa County — Maricopa County Assessor
- Pima County — Pima County Assessor
- Yavapai County — Yavapai County (via AZGeo Data Hub)
- Gila County — Gila County
- Cochise County — Cochise County
- Apache County — Apache County (via AZGeo Data Hub)
- Navajo County — Navajo County (via AZGeo Data Hub, published by AZ Dept. of Water Resources)
- La Paz County — La Paz County (via AZGeo Data Hub, published by AZ Dept. of Water Resources)
- Graham County — Graham County (via AZGeo Data Hub)
- Greenlee County — Greenlee County
- Coconino County — Coconino County parcels, published by AZ Dept. of Water Resources (via ArcGIS Online)
- Mohave County — Mohave County GIS
- Pinal County — Pinal County GIS Open Data Portal
- Santa Cruz County — Santa Cruz County GIS (via ArcGIS Online)
- Yuma County (Yuma metro area) — City of Yuma GIS, with Yuma County Assessor records
Tennessee — county sources
- Davidson County (Nashville) — Metropolitan Government of Nashville & Davidson County GIS
- Rutherford County (Murfreesboro) — Rutherford County, Tennessee GIS
- Hamilton County (Chattanooga) — Hamilton County Assessor / GIS
- Maury County (Columbia) — City of Columbia, Tennessee GIS — Maury County parcel layer (via ArcGIS Online)
- Montgomery County (Clarksville) — Clarksville–Montgomery County GIS map service (Austin Peay State University GIS Center)
- Washington County (Johnson City) — Washington County, Tennessee GIS (via ArcGIS Online)
- Williamson County (Franklin) — Williamson County, Tennessee GIS (via ArcGIS Online)
- Shelby County (Memphis) — Shelby County ITS / ReGIS (official county GIS; its public web pages are not reachable by automated link checks, so no link is given)
California — county sources
California has no single statewide parcel program, and Landlines does not cover the whole state — only the specific counties listed here, each served by that county’s GIS / assessor office or, where named, another public agency or public university. Links go to each source’s public ArcGIS service metadata page or official county open-data page.
- Alameda County — Alameda County Assessor (via ArcGIS Online)
- Butte County — Butte County GIS (via ArcGIS Online)
- Calaveras County — Calaveras County GIS
- City and County of San Francisco — City and County of San Francisco / DataSF (via ArcGIS Online)
- Colusa County — Colusa County Assessor (via ArcGIS Online)
- Contra Costa County — Contra Costa County GIS (CCMAP)
- El Dorado County — County of El Dorado GIS (via ArcGIS Online)
- Fresno County — Fresno County Public Works & Planning / Assessor
- Humboldt County — Humboldt County GIS
- Imperial County — Imperial County GIS (via ArcGIS Online)
- Inyo County — County of Inyo GIS (via ArcGIS Online)
- Kern County — Kern County GIS / Assessor (via ArcGIS Online)
- Kings County — Kings County Community Development Agency GIS (via ArcGIS Online)
- Lake County — Lake County, California GIS (via ArcGIS Online)
- Los Angeles County — Los Angeles County Assessor / eGIS
- Madera County — Madera County GIS / Assessor (via ArcGIS Online)
- Marin County — Marin County Assessor / CDA (via ArcGIS Online)
- Mariposa County — Mariposa County GIS / Assessor (via ArcGIS Online)
- Mendocino County — Mendocino County GIS (via ArcGIS Online)
- Merced County — Merced County GIS / Assessor
- Mono County — Mono County GIS
- Monterey County — County of Monterey GIS / Assessor (via ArcGIS Online)
- Napa County — Napa County GIS (via ArcGIS Online)
- Orange County — OC Survey / Orange County Assessor
- Placer County — Placer County Assessor (via ArcGIS Online)
- Plumas County — San Diego State University compilation of Plumas County parcel data (via ArcGIS Online)
- Riverside County — Riverside County Assessor
- Sacramento County — Sacramento County Assessor / GIS (via ArcGIS Online)
- San Benito County — San Benito County GIS (via ArcGIS Online)
- San Bernardino County — San Bernardino County Assessor (via ArcGIS Online)
- San Diego County — San Diego County Assessor / SanGIS
- San Joaquin County — San Joaquin County Assessor (via ArcGIS Online)
- San Luis Obispo County — County of San Luis Obispo Open Data (San Luis Obispo County GIS)
- San Mateo County — San Mateo County Assessor / GIS Division
- Santa Barbara County — County of Santa Barbara Assessor (via ArcGIS Online)
- Santa Clara County — Santa Clara County Planning & Development (via ArcGIS Online)
- Santa Cruz County — Santa Cruz County GIS / Assessor (via ArcGIS Online)
- Shasta County — Shasta County GIS (via ArcGIS Online)
- Siskiyou County — Siskiyou County GIS (via ArcGIS Online)
- Solano County — Solano County Assessor (via ArcGIS Online)
- Sonoma County — Sonoma County ISD/GIS
- Stanislaus County — Stanislaus County Assessor / GIS Central (via ArcGIS Online)
- Sutter County — Sutter County GIS / Assessor (via ArcGIS Online)
- Tehama County — Tehama County Transportation Commission GIS (via ArcGIS Online)
- Tulare County — Tulare County (via ArcGIS Online)
- Tuolumne County — Tuolumne County GIS (via ArcGIS Online)
- Ventura County — Ventura County Assessor / GIS
- Yolo County — Yolo County GIS / Assessor (via ArcGIS Online)
- Yuba County — Yuba County GIS
Illinois — county sources
Illinois has no single statewide parcel program, and Landlines does not cover the whole state — only the specific counties listed here, each served by that county’s GIS / assessor office. Links go to each source’s public ArcGIS service metadata page or official county GIS page.
- Cook County — Cook County GIS
- DuPage County — DuPage County GIS
- Kane County — Kane County GIS-Technologies
- Kankakee County — Kankakee County GIS (K3-GIS)
- Lake County — Lake County GIS
- LaSalle County — LaSalle County GIS maps
- Macon County (Decatur) — City of Decatur / Macon County GIS
- Madison County — Madison County Chief County Assessment Office GIS
- McHenry County — McHenry County GIS (via ArcGIS Online)
- Peoria County — Peoria County GIS
- Sangamon County (Springfield) — Sangamon County GIS
- St. Clair County — St. Clair County GIS
- Vermilion County (Danville) — City of Danville / Vermilion County GIS
- Will County — Will County GIS
Georgia — county & regional sources
Georgia has no single statewide parcel program, and Landlines does not cover the whole state — only the specific counties listed here, each served by that county’s assessor / GIS office (some via a regional commission or shared hosting). Links go to each source’s public ArcGIS service metadata page or official county GIS page. The Southern Georgia Regional Commission (SGRC) operates the services for Atkinson, Berrien, Coffee, Cook, and Irwin counties.
- Atkinson County — Southern Georgia Regional Commission (SGRC)
- Bartow County — Bartow County (via ArcGIS Online)
- Berrien County — Southern Georgia Regional Commission (SGRC)
- Bibb (Macon-Bibb) County — Macon-Bibb County (via ArcGIS Online)
- Chatham (Savannah) County — Savannah Area GIS (SAGIS)
- Cherokee County — Cherokee County GIS
- Clarke (Athens) County — Athens-Clarke County (via ArcGIS Online)
- Clayton County — Clayton County Tax Assessor GIS
- Cobb County — Cobb County GIS (via ArcGIS Online)
- Coffee County — Southern Georgia Regional Commission (SGRC)
- Columbia County — Columbia County (via ArcGIS Online)
- Cook County — Southern Georgia Regional Commission (SGRC)
- Coweta County — Coweta County GIS
- Dawson County — Dawson County (via ArcGIS Online)
- DeKalb County — DeKalb County GIS
- Dougherty (Albany) County — Dougherty County (via ArcGIS Online)
- Douglas County — Douglas County GIS
- Fayette County — Fayette County GIS
- Forsyth County — Forsyth County GIS
- Fulton County — Fulton County GIS
- Glynn (Brunswick) County — Glynn County GIS
- Gordon (Calhoun) County — City of Calhoun / Gordon County GIS
- Gwinnett County — Gwinnett County (via ArcGIS Online)
- Habersham County — Habersham County (RokTech regional hosting)
- Hall (Gainesville) County — Hall County GIS
- Henry County — Henry County GIS
- Irwin County — Southern Georgia Regional Commission (SGRC)
- Jackson County — Jackson County (via ArcGIS Online)
- Lowndes (Valdosta) County — Lowndes County (via ArcGIS Online)
- Muscogee (Columbus) County — Columbus Consolidated Govt (via ArcGIS Online)
- Newton County — Newton County (via ArcGIS Online)
- Paulding County — Paulding County (via ArcGIS Online)
- Richmond (Augusta) County — Augusta-Richmond County GIS
- Rockdale County — Rockdale County (via ArcGIS Online)
- Troup (LaGrange) County — Troup County (via ArcGIS Online)
- Whitfield (Dalton) County — Whitfield County GIS
South Dakota — county & local sources
South Dakota has no single statewide parcel program, and Landlines does not cover the whole state — only the specific areas listed here, each served by its own local government GIS / director of equalization office:
- City of Sioux Falls — entire city limits (spans both Minnehaha and Lincoln counties): parcel boundaries come from City of Sioux Falls GIS (linked: the City’s parcel layer on ArcGIS Online). The City maintains the parcel shapes, addresses, and land use; per the City’s GIS, the legal descriptions and ownership are “maintained by Lincoln and Minnehaha Counties” and combined into the city layer — so Sioux Falls parcels in both counties are covered by this single city source.
- Minnehaha County — rural / unincorporated areas outside the city: parcel boundaries and public-record ownership from Minnehaha County Equalization & GIS.
- Pennington County — Rapid City area: parcel boundaries and public-record ownership from the Pennington County Director of Equalization.
Landlines does not currently cover Lincoln County outside the Sioux Falls city limits, or any other South Dakota county.
Where a state does not publish a single statewide parcel feed, Landlines uses the official GIS and appraiser/assessor sources of the individual counties and municipalities within that state (published through the state agency linked below); the specific source is also credited on each parcel in the app. Government agencies publish this data “as is,” and records can lag real-world changes. Landlines is an informational reference tool, not a legal survey or a substitute for a title search. Questions about the underlying records should be directed to the publishing government agency; questions about the app can go to our support page.