diff --git a/.lando.ini b/.lando.ini
index f22e78c2dceb..5ab191b0ba71 100644
--- a/.lando.ini
+++ b/.lando.ini
@@ -3,33 +3,41 @@
 enabled = True
 
 [lando-prod]
+instance_id = lando-prod
+api_domain = api.lando.services.mozilla.com
+
 # Lando production Auth0 configuration.
 auth0_domain = auth.mozilla.auth0.com
 auth0_client_id = ccpmWbDAMz1pxHIWF4vqkdr0ScdgDyyM
 auth0_audience = https://api.lando.services.mozilla.com
 auth0_scope = openid email profile lando https://sso.mozilla.com/claim/groups
-api_domain = api.lando.services.mozilla.com
 
 [lando-dev]
+instance_id = lando-dev
+api_domain = api.dev.lando.nonprod.cloudops.mozgcp.net
+
 # Lando dev server Auth0 configuration.
 auth0_domain = auth.mozilla.auth0.com
 auth0_client_id = TAtuZwbJd4SRtWg0YznfS1YYCatOvvnX
 auth0_audience = https://api.lando.devsvcdev.mozaws.net
 auth0_scope = openid email profile lando https://sso.mozilla.com/claim/groups
-api_domain = api.dev.lando.nonprod.cloudops.mozgcp.net
 
 [lando-prod-new]
+instance_id = lando-prod-2025
+api_domain = lando.moz.tools
+
 # Lando production Auth0 configuration.
 auth0_domain = auth.mozilla.auth0.com
 auth0_client_id = ccpmWbDAMz1pxHIWF4vqkdr0ScdgDyyM
 auth0_audience = https://lando.moz.tools
 auth0_scope = openid email profile lando https://sso.mozilla.com/claim/groups
-api_domain = lando.moz.tools
 
 [lando-dev-new]
+instance_id = lando-dev-2025
+api_domain = lando-dev.allizom.org
+
 # Lando dev server Auth0 configuration.
 auth0_domain = auth.mozilla.auth0.com
 auth0_client_id = TAtuZwbJd4SRtWg0YznfS1YYCatOvvnX
 auth0_audience = https://lando-dev.allizom.org
 auth0_scope = openid email profile lando https://sso.mozilla.com/claim/groups
-api_domain = lando-dev.allizom.org
diff --git a/tools/tryselect/lando.py b/tools/tryselect/lando.py
index dade3ba6fbd2..79c5da94d820 100644
--- a/tools/tryselect/lando.py
+++ b/tools/tryselect/lando.py
@@ -321,6 +321,7 @@ class LandoAPI:
 
     access_token: str
     api_url: str
+    instance_id: str
     verify_tls: bool = True
 
     @property
@@ -366,6 +367,7 @@ class LandoAPI:
         return LandoAPI(
             api_url=parser.get(section, "api_domain"),
             access_token=token["access_token"],
+            instance_id=parser.get(section, "instance_id", fallback=section),
             verify_tls=parser.getboolean(section, "verify_tls", fallback=True),
         )
 
@@ -495,6 +497,6 @@ def push_to_lando_try(
         build.notify(success_msg)
 
     return {
-        "lando_instance": lando_config_section,
+        "lando_instance": lando_api.instance_id,
         "lando_job_id": job_id,
     }
diff --git a/tools/tryselect/test/python.toml b/tools/tryselect/test/python.toml
index 8904b4ca3738..de4e7f276f7f 100644
--- a/tools/tryselect/test/python.toml
+++ b/tools/tryselect/test/python.toml
@@ -11,6 +11,8 @@ subsuite = "try"
 
 ["test_mozharness_integration.py"]
 
+["test_lando_api.py"]
+
 ["test_perf.py"]
 
 ["test_perfcomparators.py"]
diff --git a/tools/tryselect/test/test_lando_api.py b/tools/tryselect/test/test_lando_api.py
new file mode 100644
index 000000000000..385651fc1e5a
--- /dev/null
+++ b/tools/tryselect/test/test_lando_api.py
@@ -0,0 +1,55 @@
+from textwrap import dedent
+from typing import Optional
+from unittest import mock
+
+import mozunit
+import pytest
+from tryselect.lando import LandoAPI
+
+
+@mock.patch("tryselect.lando.Auth0Config")
+@pytest.mark.parametrize(
+    "section,expected_instance_id",
+    (
+        ("no_id", "no_id"),
+        ("id", "id_present"),
+        ("missing", None),
+    ),
+)
+def test_lando_api_from_lando_config_file(
+    auth0_config: mock.Mock, section: str, expected_instance_id: Optional[str]
+):
+    mock_config_path = mock.MagicMock()
+    mock_config_path.exists.return_value = True
+    mock_config_path.read_text.return_value = dedent("""
+       [no_id]
+       api_domain = no_id.lando.example.net
+       # Lando production Auth0 configuration.
+       auth0_domain = auth.example.net
+       auth0_client_id = xXxX
+       auth0_audience = https://no_id.lando.example.net
+       auth0_scope = openid email profile lando https://sso.mozilla.com/claim/groups
+       [id]
+       instance_id = id_present
+       api_domain = id.lando.example.net
+       # Lando production Auth0 configuration.
+       auth0_domain = auth.example.net
+       auth0_client_id = XxXx
+       auth0_audience = https://id.lando.example.net
+       auth0_scope = openid email profile lando https://sso.mozilla.com/claim/groups
+       """)
+
+    if expected_instance_id is None:
+        with pytest.raises(
+            ValueError, match=f"Lando config file does not have a {section} section."
+        ):
+            lando_api = LandoAPI.from_lando_config_file(mock_config_path, section)
+    else:
+        lando_api = LandoAPI.from_lando_config_file(mock_config_path, section)
+        assert lando_api.instance_id == expected_instance_id, (
+            "Unexpected LandoApi instance_id"
+        )
+
+
+if __name__ == "__main__":
+    mozunit.main()