diff --git a/src/status/myDomainResolver.ts b/src/status/myDomainResolver.ts
index 1d927c115..d127d8bf6 100644
--- a/src/status/myDomainResolver.ts
+++ b/src/status/myDomainResolver.ts
@@ -83,24 +83,24 @@ export class MyDomainResolver extends AsyncOptionalCreatable<MyDomainResolver.Op
     const self: MyDomainResolver = this;
     const pollingOptions: PollingClient.Options = {
       async poll(): Promise<StatusResult> {
-        const { host } = self.options.url;
+        const { hostname } = self.options.url;
         let dnsResult: { address: string };
         try {
-          self.logger.debug(`Attempting to resolve url: ${host}`);
+          self.logger.debug(`Attempting to resolve url: ${hostname}`);
           if (new SfdcUrl(self.options.url).isLocalUrl()) {
             return {
               completed: true,
               payload: '127.0.0.1',
             };
           }
-          dnsResult = await promisify(lookup)(host);
-          self.logger.debug(`Successfully resolved host: ${host} result: ${JSON.stringify(dnsResult)}`);
+          dnsResult = await promisify(lookup)(hostname);
+          self.logger.debug(`Successfully resolved host: ${hostname} result: ${JSON.stringify(dnsResult)}`);
           return {
             completed: true,
             payload: dnsResult.address,
           };
         } catch (e) {
-          self.logger.debug(`An error occurred trying to resolve: ${host}`);
+          self.logger.debug(`An error occurred trying to resolve: ${hostname}`);
           self.logger.debug(`Error: ${(e as Error).message}`);
           self.logger.debug('Re-trying dns lookup again....');
           return {
diff --git a/src/util/sfdcUrl.ts b/src/util/sfdcUrl.ts
index 53dd811cb..326275097 100644
--- a/src/util/sfdcUrl.ts
+++ b/src/util/sfdcUrl.ts
@@ -135,7 +135,7 @@ export class SfdcUrl extends URL {
       '.stm.salesforce.ms',
       '.pc-rnd.force.com',
       '.pc-rnd.salesforce.com',
-      '.wc.crm.dev', // workspaces container
+      '.crm.dev', // workspaces container
     ];
     return (
       this.origin.startsWith('https://gs1.') ||
diff --git a/test/unit/status/myDomainResolver.test.ts b/test/unit/status/myDomainResolver.test.ts
index ac12db42c..ff5a932c2 100644
--- a/test/unit/status/myDomainResolver.test.ts
+++ b/test/unit/status/myDomainResolver.test.ts
@@ -20,7 +20,8 @@ describe('myDomainResolver', () => {
   const TEST_IP = '1.1.1.1';
   const CALL_COUNT = 3;
 
-  let lookupAsyncSpy: { callCount: number };
+  let lookupAsyncSpy: sinon.SinonStub;
+
   beforeEach(() => {
     lookupAsyncSpy = $$.SANDBOX.stub(dns, 'lookup').callsFake((host: string, callback: AnyFunction) => {
       const isDefaultHost = host === MyDomainResolver.DEFAULT_DOMAIN.host;
@@ -45,6 +46,17 @@ describe('myDomainResolver', () => {
     expect(lookupAsyncSpy.callCount).to.be.equal(CALL_COUNT);
   });
 
+  it('should do lookup without port', async () => {
+    const options: MyDomainResolver.Options = {
+      url: new URL(`https://${POSITIVE_HOST}:6101`),
+    };
+    const resolver: MyDomainResolver = await MyDomainResolver.create(options);
+    const ip = await resolver.resolve();
+    expect(ip).to.be.equal(TEST_IP);
+    // verify that it uses hostname (without port) not host
+    expect(lookupAsyncSpy.args[0][0]).to.be.equal(POSITIVE_HOST);
+  });
+
   describe('disable dns check', () => {
     const env = new Env();
     it('should return host if SFDX_DISABLE_DNS_CHECK is set to true', async () => {
diff --git a/test/unit/util/sfdcUrl.test.ts b/test/unit/util/sfdcUrl.test.ts
index 0abe9dd54..640e5611e 100644
--- a/test/unit/util/sfdcUrl.test.ts
+++ b/test/unit/util/sfdcUrl.test.ts
@@ -180,9 +180,16 @@ describe('util/sfdcUrl', () => {
       expect(url.isLocalUrl()).to.equal(true);
     });
     it('workspaces with port is internal but not local', () => {
-      const url = new SfdcUrl('https://dev.salesforce-com.shane-mclaughlin-0lrfx7zp3l121.wc.crm.dev:6101/');
-      expect(url.isInternalUrl()).to.equal(true);
-      expect(url.isLocalUrl()).to.equal(false);
+      const urls = [
+        'https://dev.salesforce-com.shane-mclaughlin-0lrfx7zp3l121.wc.crm.dev:6101/',
+        'https://dev.salesforce-com.shane-mclaughlin-0lrfx7zp3l121.wb.crm.dev:6101/',
+        'https://dev.salesforce-com.shane-mclaughlin-0lrfx7zp3l121.wa.crm.dev:6101/',
+      ].map((u) => new SfdcUrl(u));
+
+      urls.map((url) => {
+        expect(url.isInternalUrl()).to.equal(true);
+        expect(url.isLocalUrl()).to.equal(false);
+      });
     });
   });