diff --git a/components/breadcrumbs.js b/components/breadcrumbs.js
index 8cad3c16..bf48acf2 100644
--- a/components/breadcrumbs.js
+++ b/components/breadcrumbs.js
@@ -13,8 +13,8 @@ import {
     setRepresentationSubmit
 } from "../store/currentView/action";
 import {
-    normalizeRouteStateQuery,
-    resolveSearchResultsHref
+    resolveSearchResultsHref,
+    resolveSearchBreadcrumbLabel
 } from "../lib/routing/routeState";
 const Breadcrumbs = (props) => {
     const {
@@ -73,9 +73,6 @@ const Breadcrumbs = (props) => {
               ? 9
               : "";
 
-    const routeState = normalizeRouteStateQuery(router.query);
-    const { viewAll, advanced, address, key } = routeState;
-
     const hideServiceNamePaths = [
         "/myportal/[appealtypes]",
         "/newappeal",
@@ -112,24 +109,13 @@ const Breadcrumbs = (props) => {
         fallbackToMyPortalWhenNoFlags: false
     });
 
-    const breadcrumbLabel = (() => {
-        if (viewAll) {
-            return getViewAllLabel(key);
-        }
-
-        const keyedLabel = getViewAllLabel(key);
-        if (keyedLabel) return keyedLabel;
-
-        if (advanced) {
-            return t("common:breadcrumb-advanced-search-results");
-        }
-
-        if (address) {
-            return t("common:breadcrumb-address-search-results");
-        }
-
-        return t("common:breadcrumb-search-results");
-    })();
+    const breadcrumbLabel = resolveSearchBreadcrumbLabel({
+        query: router.query,
+        getViewAllLabel,
+        advancedLabel: t("common:breadcrumb-advanced-search-results"),
+        addressLabel: t("common:breadcrumb-address-search-results"),
+        defaultLabel: t("common:breadcrumb-search-results")
+    });
     return (
         <>
             <nav
diff --git a/components/case/summary.js b/components/case/summary.js
index cbbe4b7c..660b874d 100644
--- a/components/case/summary.js
+++ b/components/case/summary.js
@@ -45,7 +45,10 @@ import {
     showRepsEnded,
     getBilingualText
 } from "./summary/utils/helpers";
-import { resolveSearchResultsHref } from "../../lib/routing/routeState";
+import {
+    resolveSearchResultsHref,
+    isDnsRoutePath
+} from "../../lib/routing/routeState";
 
 import CaseNoticeBanner from "./caseNoticeBanner";
 import WatchModal from "./watchmodal";
@@ -325,11 +328,7 @@ const CaseSummary = (props) => {
 
     const zoom = isNaN(parseFloat(siteCoords.latitude)) ? 7 : 12;
 
-    const isDnsRoute =
-        router.pathname === "/dns" ||
-        router.pathname.startsWith("/dns/") ||
-        router.pathname === "/myportal/dns" ||
-        router.pathname.startsWith("/myportal/dns/");
+    const isDnsRoute = isDnsRoutePath(router.pathname);
 
     const searchHref = resolveSearchResultsHref({
         query: router.query,
diff --git a/lib/routing/routeState.js b/lib/routing/routeState.js
index 3784751d..387f957d 100644
--- a/lib/routing/routeState.js
+++ b/lib/routing/routeState.js
@@ -60,3 +60,35 @@ export const resolveSearchResultsHref = ({
         query
     };
 };
+
+export const resolveSearchBreadcrumbLabel = ({
+    query = {},
+    getViewAllLabel = () => null,
+    advancedLabel = "",
+    addressLabel = "",
+    defaultLabel = ""
+} = {}) => {
+    const routeState = normalizeRouteStateQuery(query);
+    const { viewAll, advanced, address, key } = routeState;
+
+    if (viewAll) {
+        return getViewAllLabel(key);
+    }
+
+    const keyedLabel = getViewAllLabel(key);
+    if (keyedLabel) return keyedLabel;
+
+    if (advanced) return advancedLabel;
+    if (address) return addressLabel;
+
+    return defaultLabel;
+};
+
+export const isDnsRoutePath = (pathname = "") => {
+    return (
+        pathname === "/dns" ||
+        pathname.startsWith("/dns/") ||
+        pathname === "/myportal/dns" ||
+        pathname.startsWith("/myportal/dns/")
+    );
+};
diff --git a/memory-bank/change-log.md b/memory-bank/change-log.md
index ee5ba512..bf89081c 100644
--- a/memory-bank/change-log.md
+++ b/memory-bank/change-log.md
@@ -52,6 +52,37 @@ Follow-ups:
 - If needed, triage/fix the existing phase22 auth redirect test harness failure separately to restore full combined suite execution.
 - Expand helper adoption in future slices to other navigation decision call sites if additional duplication emerges.
 
+### CL-22541-B: breadcrumb route-state helper expansion (label + DNS path helper)
+
+date: 2026-04-09  
+author: Cline  
+scope: `lib/routing/routeState.js`, `components/breadcrumbs.js`, `components/case/summary.js`, `tests/phase22/route-state-helper.test.cjs`  
+type: change  
+rationale: Continue Priority 3 breadcrumb refactor in a second bounded commit by extracting remaining repeated breadcrumb label and DNS-route-path decision logic into shared pure helpers.
+impact: Refactor-only extraction for navigation decision logic; no auth/session/CSP/API changes; no intended EN/CY behavior change beyond internal logic centralization.
+status: completed
+
+Summary:
+
+- Extended `lib/routing/routeState.js` with:
+    - `resolveSearchBreadcrumbLabel(...)`
+    - `isDnsRoutePath(pathname)`
+- Updated `components/breadcrumbs.js` to use `resolveSearchBreadcrumbLabel(...)` and removed inline label decision IIFE.
+- Updated `components/case/summary.js` to use `isDnsRoutePath(router.pathname)` and removed inline DNS path checks.
+- Expanded `tests/phase22/route-state-helper.test.cjs` with coverage for:
+    - breadcrumb label resolution matrix
+    - DNS path detection helper
+
+Validation:
+
+- `npx eslint lib/routing/routeState.js components/breadcrumbs.js components/case/summary.js tests/phase22/route-state-helper.test.cjs` -> pass with 1 pre-existing warning in `components/case/summary.js` (`react-hooks/exhaustive-deps`).
+- `node tests/phase22/route-state-helper.test.cjs` -> pass (7/7).
+- `node tests/phase22/index.test.cjs` -> pass (combined suite).
+
+Follow-ups:
+
+- Next breadcrumbs slice can target incremental decomposition of large pathname branch rendering blocks in `components/breadcrumbs.js` into grouped render helpers with behavior parity.
+
 ### CL-00X: 22500 `components/elements/index.js` Phase 1 helper extraction
 
 date: 2026-04-07  
diff --git a/tests/phase22/route-state-helper.test.cjs b/tests/phase22/route-state-helper.test.cjs
index 6b2ac398..86df1b01 100644
--- a/tests/phase22/route-state-helper.test.cjs
+++ b/tests/phase22/route-state-helper.test.cjs
@@ -11,7 +11,7 @@ const loadRouteStateModule = () => {
 
     source = source.replace(/export const\s+/g, "const ");
     source +=
-        "\nmodule.exports = { normalizeRouteStateQuery, resolveSearchResultsHref };\n";
+        "\nmodule.exports = { normalizeRouteStateQuery, resolveSearchResultsHref, resolveSearchBreadcrumbLabel, isDnsRoutePath };\n";
 
     const context = {
         module: { exports: {} },
@@ -116,6 +116,48 @@ test("routing/routeState supports DNS route override", async () => {
     });
 });
 
+test("routing/routeState resolves breadcrumb label using key and route flags", async () => {
+    const mod = loadRouteStateModule();
+    const getViewAllLabel = (key) =>
+        ({ myCases: "My Cases", watchedCases: "Watched Cases" })[key] || null;
+
+    const fromViewAll = mod.resolveSearchBreadcrumbLabel({
+        query: { va: "true", key: "myCases" },
+        getViewAllLabel,
+        advancedLabel: "Advanced",
+        addressLabel: "Address",
+        defaultLabel: "Search"
+    });
+    const fromAdvanced = mod.resolveSearchBreadcrumbLabel({
+        query: { adv: "true" },
+        getViewAllLabel,
+        advancedLabel: "Advanced",
+        addressLabel: "Address",
+        defaultLabel: "Search"
+    });
+    const fromDefault = mod.resolveSearchBreadcrumbLabel({
+        query: {},
+        getViewAllLabel,
+        advancedLabel: "Advanced",
+        addressLabel: "Address",
+        defaultLabel: "Search"
+    });
+
+    assert.strictEqual(fromViewAll, "My Cases");
+    assert.strictEqual(fromAdvanced, "Advanced");
+    assert.strictEqual(fromDefault, "Search");
+});
+
+test("routing/routeState identifies dns and myportal dns route prefixes", async () => {
+    const mod = loadRouteStateModule();
+
+    assert.strictEqual(mod.isDnsRoutePath("/dns"), true);
+    assert.strictEqual(mod.isDnsRoutePath("/dns/development"), true);
+    assert.strictEqual(mod.isDnsRoutePath("/myportal/dns"), true);
+    assert.strictEqual(mod.isDnsRoutePath("/myportal/dns/applications"), true);
+    assert.strictEqual(mod.isDnsRoutePath("/case/123"), false);
+});
+
 const run = async () => {
     let passed = 0;