diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e7982d..1da1932 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,16 @@ All notable changes to netbox-super-cli are tracked here. Format follows [Keep a
 
 ## Unreleased
 
+### Fixed
+
+- **A profile's sticky branch no longer follows `--url` to another server**
+  ([#171]). When `--url`/`NSC_URL` targets a different server from the
+  profile's, the profile `branch:` is ignored instead of failing with
+  `not_found` on the other server, and a one-line stderr notice says so.
+  `--branch` and `NSC_BRANCH` still apply. `nsc branch use` / `branch create
+  --use` now refuse (exit 12) to write or clear the profile's branch while a
+  URL override points at another server.
+
 ## v1.8.2 — 2026-10-23
 
 Patch release. An invalid output format is now a usage error instead of a crash.
@@ -121,6 +131,7 @@ notices, and a fix for `nsc login` reporting the wrong user.
 [#1]: https://github.com/thomaschristory/netbox-super-cli/issues/1
 [#166]: https://github.com/thomaschristory/netbox-super-cli/issues/166
 [#170]: https://github.com/thomaschristory/netbox-super-cli/issues/170
+[#171]: https://github.com/thomaschristory/netbox-super-cli/issues/171
 [#179]: https://github.com/thomaschristory/netbox-super-cli/issues/179
 [#173]: https://github.com/thomaschristory/netbox-super-cli/issues/173
 [#150]: https://github.com/thomaschristory/netbox-super-cli/issues/150
diff --git a/docs/guides/branching.md b/docs/guides/branching.md
index d402550..24da642 100644
--- a/docs/guides/branching.md
+++ b/docs/guides/branching.md
@@ -34,6 +34,12 @@ The active branch comes from the first of these that is set:
 `--branch main` or `NSC_BRANCH=main` forces main for that invocation even when
 the profile has a sticky branch.
 
+A profile's sticky branch belongs to that profile's server. When `--url` or
+`NSC_URL` points at a different server, it is ignored, with a one-line notice
+on stderr (`--branch` and `NSC_BRANCH` still apply). `nsc branch use` and
+`nsc branch create --use` refuse to change the profile's branch while a URL
+override points elsewhere.
+
 `--branch` is a global option and must come **before** the subcommand
 (`nsc --branch X dcim sites list`). After the subcommand, `--branch` belongs to
 that command, for example the Branching plugin's own `changes list` filter, and
diff --git a/docs/guides/managing-profiles.md b/docs/guides/managing-profiles.md
index dc56046..7565b94 100644
--- a/docs/guides/managing-profiles.md
+++ b/docs/guides/managing-profiles.md
@@ -110,7 +110,8 @@ Override precedence (highest first): CLI flag > env var > config profile.
 The same precedence applies to the NetBox Branching branch: `--branch NAME` >
 `NSC_BRANCH` > the profile's `branch:` key. `nsc branch use NAME` writes that
 key, and `nsc branch use --main` removes it. `--branch main` forces main for
-one command. See [NetBox Branching](branching.md).
+one command. The profile's `branch:` is ignored when `--url`/`NSC_URL` points
+at a different server. See [NetBox Branching](branching.md).
 
 ```yaml
 profiles:
diff --git a/nsc/cli/branch_commands.py b/nsc/cli/branch_commands.py
index eb5b1a8..5e80bf9 100644
--- a/nsc/cli/branch_commands.py
+++ b/nsc/cli/branch_commands.py
@@ -30,7 +30,7 @@
 from nsc.branching.models import Branch, choice_value
 from nsc.branching.resolve import get_branch, require_ready
 from nsc.cache.store import ADHOC_PROFILE
-from nsc.cli.runtime import MAIN_BRANCH, RuntimeContext, emit_envelope, map_error
+from nsc.cli.runtime import MAIN_BRANCH, RuntimeContext, emit_envelope, map_error, same_server
 from nsc.config.models import OutputFormat
 from nsc.http.client import NetBoxClient
 from nsc.http.errors import NetBoxAPIError, NetBoxClientError
@@ -165,17 +165,30 @@ def _write_profile_branch(runtime: RuntimeContext, value: str | None) -> None:
 
 
 def _require_saved_profile(runtime: RuntimeContext, name: str | None) -> None:
-    if runtime.resolved_profile.name != ADHOC_PROFILE:
-        return
+    profile = runtime.resolved_profile
     hint = name or "<name>"
-    _fail(
-        runtime,
-        ErrorEnvelope(
-            error="no saved profile to store the branch on; "
-            f"set NSC_BRANCH={hint} or pass --branch {hint}",
-            type=ErrorType.CONFIG,
-        ),
-    )
+    if profile.name == ADHOC_PROFILE:
+        _fail(
+            runtime,
+            ErrorEnvelope(
+                error="no saved profile to store the branch on; "
+                f"set NSC_BRANCH={hint} or pass --branch {hint}",
+                type=ErrorType.CONFIG,
+            ),
+        )
+    saved = runtime.config.profiles.get(profile.name)
+    if saved is not None and not same_server(str(profile.url), saved.url):
+        # A sticky branch is per profile server; storing one picked on another
+        # server would apply it to the wrong NetBox.
+        _fail(
+            runtime,
+            ErrorEnvelope(
+                error=f"--url/NSC_URL targets {profile.url}, not profile {profile.name}'s "
+                f"server {saved.url}; drop the URL override, or use --branch {hint} / "
+                f"NSC_BRANCH={hint} for this server",
+                type=ErrorType.CONFIG,
+            ),
+        )
 
 
 def _use(runtime: RuntimeContext, branch: Branch) -> None:
diff --git a/nsc/cli/globals.py b/nsc/cli/globals.py
index 252b314..14900c8 100644
--- a/nsc/cli/globals.py
+++ b/nsc/cli/globals.py
@@ -11,6 +11,7 @@
 from nsc.cli.runtime import (
     CLIOverrides,
     RuntimeContext,
+    ignored_profile_branch,
     resolve_branch_selection,
     resolve_color,
     resolve_object_colors,
@@ -48,6 +49,12 @@ def build_runtime_context(state: GlobalState) -> RuntimeContext:
         force_refresh=state.overrides.refresh_schema,
     )
     branch = resolve_branch_selection(state.config, state.overrides, env=os.environ)
+    ignored = ignored_profile_branch(state.config, state.overrides, env=os.environ)
+    if ignored is not None and branch is None:
+        print(
+            f"⎇ profile branch {ignored} ignored: --url/NSC_URL targets another server",
+            file=sys.stderr,
+        )
     client = NetBoxClient(
         profile,  # type: ignore[arg-type]
         debug=state.debug,
diff --git a/nsc/cli/runtime.py b/nsc/cli/runtime.py
index d8cc823..bcc86e1 100644
--- a/nsc/cli/runtime.py
+++ b/nsc/cli/runtime.py
@@ -13,7 +13,7 @@
 from collections.abc import Iterable, Iterator, Mapping
 from typing import Any, Literal
 
-from pydantic import BaseModel, ConfigDict, HttpUrl, SkipValidation
+from pydantic import BaseModel, ConfigDict, HttpUrl, SkipValidation, ValidationError
 
 from nsc.auth.keyring_store import KeyringStoreError, resolve_token
 from nsc.branching.errors import (
@@ -171,12 +171,14 @@ def resolve_branch_selection(
     overrides: CLIOverrides,
     env: Mapping[str, str],
 ) -> BranchSelection | None:
-    name = overrides.profile or env.get("NSC_PROFILE") or config.default_profile
-    base = config.profiles.get(name) if name else None
+    base, _ = _select_base_profile(config, overrides, env)
+    profile_branch = base.branch if base else None
+    if ignored_profile_branch(config, overrides, env) is not None:
+        profile_branch = None
     candidates: list[tuple[str | None, Literal["flag", "env", "profile"]]] = [
         (overrides.branch, "flag"),
         (env.get("NSC_BRANCH"), "env"),
-        (base.branch if base else None, "profile"),
+        (profile_branch, "profile"),
     ]
     for value, source in candidates:
         if value:
@@ -184,6 +186,19 @@ def resolve_branch_selection(
     return None
 
 
+def ignored_profile_branch(
+    config: Config, overrides: CLIOverrides, env: Mapping[str, str]
+) -> str | None:
+    """The profile's sticky branch, when --url/NSC_URL points at another server."""
+    base, _ = _select_base_profile(config, overrides, env)
+    if base is None or not base.branch:
+        return None
+    url_override = _first_set(overrides.url, env.get("NSC_URL"))
+    if url_override is None or same_server(url_override, base.url):
+        return None
+    return base.branch
+
+
 def _select_base_profile(
     config: Config, overrides: CLIOverrides, env: Mapping[str, str]
 ) -> tuple[Profile | None, str]:
@@ -195,6 +210,14 @@ def _select_base_profile(
     return config.profiles[name], name
 
 
+def same_server(raw: str, url: HttpUrl) -> bool:
+    try:
+        parsed = HttpUrl(raw)
+    except ValidationError:
+        return False
+    return str(parsed).rstrip("/") == str(url).rstrip("/")
+
+
 def _first_set(*values: str | None) -> str | None:
     for v in values:
         if v is not None and v != "":
diff --git a/tests/cli/test_branch_commands.py b/tests/cli/test_branch_commands.py
index ff2558a..eb2ecb2 100644
--- a/tests/cli/test_branch_commands.py
+++ b/tests/cli/test_branch_commands.py
@@ -26,10 +26,10 @@ def _home(monkeypatch: pytest.MonkeyPatch, fixture_profile_yaml: Path) -> Path:
     return fixture_profile_yaml
 
 
-def _mock_schema(router: respx.Router) -> None:
+def _mock_schema(router: respx.Router, base: str = NB) -> None:
     bundled = next(Path("nsc/schemas/bundled").glob("*.json*"))
     body = gzip.decompress(bundled.read_bytes())
-    router.get(f"{NB}/api/schema/?format=json").respond(
+    router.get(f"{base}/api/schema/?format=json").respond(
         200, content=body, headers={"content-type": "application/json"}
     )
 
@@ -289,3 +289,41 @@ def test_saved_filter_branch_failure_honours_json_output(
     assert envelope["type"] == "config"
     assert envelope["details"]["branch"] == "my-change"
     assert not sites.called
+
+
+OTHER = "https://other.example"
+
+
+@pytest.mark.httpx2(assert_all_called=False)
+@pytest.mark.parametrize("args", [["use", "--main"], ["use", "my-change"]])
+def test_use_refuses_when_url_targets_another_server(
+    httpx2_mock: respx.Router, _home: Path, args: list[str]
+) -> None:
+    _mock_schema(httpx2_mock, OTHER)
+    _set_profile_branch(_home, "keep-me")
+    before = (_home / "config.yaml").read_text()
+    result = _invoke("--url", OTHER, "branch", *args, "--output", "json")
+    assert result.exit_code == 12, result.output
+    assert OTHER in json.loads(result.stdout)["error"]
+    assert (_home / "config.yaml").read_text() == before
+
+
+@pytest.mark.httpx2(assert_all_called=False)
+def test_create_use_refuses_before_creating_on_another_server(
+    httpx2_mock: respx.Router, _home: Path
+) -> None:
+    _mock_schema(httpx2_mock, OTHER)
+    create = httpx2_mock.post(f"{OTHER}/api/plugins/branching/branches/").respond(201, json={})
+    result = _invoke("--url", OTHER, "branch", "create", "x", "--use", "--output", "json")
+    assert result.exit_code == 12, result.output
+    assert not create.called
+
+
+@pytest.mark.httpx2(assert_all_called=False)
+def test_ignored_profile_branch_prints_notice(httpx2_mock: respx.Router, _home: Path) -> None:
+    _mock_schema(httpx2_mock, OTHER)
+    _set_profile_branch(_home, "keep-me")
+    result = _invoke("--url", OTHER, "branch", "current", "--output", "json")
+    assert result.exit_code == 0, result.output
+    assert "keep-me" in result.stderr
+    assert "ignored" in result.stderr
diff --git a/tests/cli/test_runtime_branch.py b/tests/cli/test_runtime_branch.py
index 345090b..1827821 100644
--- a/tests/cli/test_runtime_branch.py
+++ b/tests/cli/test_runtime_branch.py
@@ -15,7 +15,13 @@
 from nsc.cli import globals as globals_mod
 from nsc.cli.app import _extract_global_overrides, _first_non_option
 from nsc.cli.globals import GlobalState, build_runtime_context
-from nsc.cli.runtime import BranchSelection, CLIOverrides, map_error, resolve_branch_selection
+from nsc.cli.runtime import (
+    BranchSelection,
+    CLIOverrides,
+    ignored_profile_branch,
+    map_error,
+    resolve_branch_selection,
+)
 from nsc.config.loader import load_config
 from nsc.config.models import Config, Profile
 from nsc.model.command_model import CommandModel
@@ -155,3 +161,56 @@ def test_branch_before_subcommand_is_global_and_other_flags_still_scan() -> None
 def test_first_non_option_skips_branch_value() -> None:
     assert _first_non_option(["--branch", "x", "profiles", "list"]) == "profiles"
     assert _first_non_option(["--branch=x", "profiles", "list"]) == "profiles"
+
+
+@pytest.mark.parametrize(
+    ("overrides", "env"),
+    [
+        (CLIOverrides(url="https://other.example"), {}),
+        (CLIOverrides(), {"NSC_URL": "https://other.example/"}),
+    ],
+)
+def test_profile_branch_ignored_when_url_targets_another_server(
+    overrides: CLIOverrides, env: dict[str, str]
+) -> None:
+    assert resolve_branch_selection(_cfg(), overrides, env=env) is None
+
+
+@pytest.mark.parametrize("url", ["https://nb.example", "https://nb.example/", "https://NB.example"])
+def test_profile_branch_kept_when_url_override_matches_profile(url: str) -> None:
+    sel = resolve_branch_selection(_cfg(), CLIOverrides(url=url), env={})
+    assert sel == BranchSelection(name="prof-branch", source="profile")
+
+
+def test_explicit_branch_still_applies_with_url_override() -> None:
+    other = CLIOverrides(url="https://other.example")
+    assert resolve_branch_selection(_cfg(), other, env={"NSC_BRANCH": "e"}) == BranchSelection(
+        name="e", source="env"
+    )
+    with_flag = CLIOverrides(url="https://other.example", branch="f")
+    assert resolve_branch_selection(_cfg(), with_flag, env={}) == BranchSelection(
+        name="f", source="flag"
+    )
+
+
+def _prefixed_cfg() -> Config:
+    return Config(
+        default_profile="p",
+        profiles={"p": Profile(name="p", url="https://nb.example/netbox", token="t", branch="pb")},
+    )
+
+
+def test_profile_branch_with_path_prefix_matches_only_same_prefix() -> None:
+    same = CLIOverrides(url="https://nb.example/netbox/")
+    assert resolve_branch_selection(_prefixed_cfg(), same, env={}) == BranchSelection(
+        name="pb", source="profile"
+    )
+    root = CLIOverrides(url="https://nb.example")
+    assert resolve_branch_selection(_prefixed_cfg(), root, env={}) is None
+
+
+def test_ignored_profile_branch_is_reported() -> None:
+    other = CLIOverrides(url="https://other.example")
+    assert ignored_profile_branch(_cfg(), other, env={}) == "prof-branch"
+    assert ignored_profile_branch(_cfg(), CLIOverrides(), env={}) is None
+    assert ignored_profile_branch(_cfg(branch=None), other, env={}) is None