Arizona / State-run network

AZ CORS (ADWR Height Modernization)

Free

State-run network

Free

Arizona Dept of Water Resources

Good to know: Free (registration required)

All plans
PlanPriceTerm
AccessFree (registration required)
Coverage
Where it works
State-run network for Arizona.
Needs cell signal?
Yes: NTRIPThe standard way RTK corrections are sent over the internet. Think of it as internet radio for correction data.Full definition needs internet at the RoverThe receiver that moves around the job, like a survey pole or a drone. It uses the base's corrections to find its exact spot.Full definition (cell data or a phone hotspot). General rule, not an operator statement.
Connection settings

NTRIP caster

hostazcors.azwater.gov
PortA number that tells your device which "door" on the caster server to use. For NTRIP it's often 2101.Full definition8080
mountsNot published on public page (Mount pointOne specific correction stream on a caster, like one channel on a radio. Each one comes from a certain station or network setup.Full definition PDF after registration)

Host and port confirmed reachable on Oct 17, 2026, but the CasterThe internet server that hands out correction streams. Your rover logs in to it, like tuning into a radio station.Full definition refuses anonymous SourcetableThe list of every mount point a caster offers. Your app shows it when you connect without picking one.Full definition requests (HTTP 403), so we couldn't list mountpoints.

Sign-up steps
  1. Register at azcors.azwater.gov
  2. Wait for validation and approval of your data request
  3. Connect to azcors.azwater.gov port 8080
Sign-up page
Go to sign-up →
How long approval takes
Not published (registration, validation, data request and approval required)
Fine print
Last checked
Oct 17, 2026
Partial state coverage. Operator site returns 403 to our fetcher, so free status comes from search snapshots of the operator page.
States covered1

Not listed by the operator: free trial, discounts, what's included, station count and a few other details. Ask them before you sign up if these matter to you.

Checked Oct 17, 2026 Sources: [1] [2] · Report a change

No user reliability reports yet. Used it in the field? Tell us how it went.

Price changes and new stations, once a month.

New state networks, price changes and reliability reports. One email a month, no spam.