diff --git a/index.js b/index.js
index d665b9cf..1b65641f 100644
--- a/index.js
+++ b/index.js
@@ -657,11 +657,16 @@ const createClient = (profile, userAgent, opt = {}) => {
 		if ('number' !== typeof east) {
 			throw new TypeError('east must be a number.');
 		}
-		if (north <= south) {
-			throw new Error('north must be larger than south.');
+		// With a bounding box across the antimeridian, east (e.g. -175) might be smaller than west (e.g. 175).
+		// Likewise, across the north/south poles, north (e.g. -85) might be smaller than south (e.g. 85).
+		// In these cases, the terms north/south & east/west become rather arbitrary of couse.
+		// see also https://antimeridian.readthedocs.io/en/stable/
+		// todo: how does HAFAS handle this?
+		if (north === south) {
+			throw new Error('bbox.north must not be equal to bbox.south.');
 		}
-		if (east <= west) {
-			throw new Error('east must be larger than west.');
+		if (east === west) {
+			throw new Error('bbox.east must not be equal to bbox.west.');
 		}
 
 		opt = Object.assign({
diff --git a/test/e2e/db.js b/test/e2e/db.js
index e458b845..b5b96f93 100644
--- a/test/e2e/db.js
+++ b/test/e2e/db.js
@@ -477,6 +477,19 @@ tap.test('radar', async (t) => {
 	t.end();
 });
 
+tap.test('radar works across the antimeridian', async (t) => {
+	await client.radar({
+		north: -8,
+		west: 179,
+		south: -10,
+		east: -179,
+	}, {
+		// todo: update `when`, re-record all fixtures, remove this special handling
+		when: process.env.VCR_MODE ? '2024-02-22T16:00+01:00' : when,
+	});
+	t.end();
+});
+
 tap.test('reachableFrom', {timeout: 20 * 1000}, async (t) => {
 	const torfstr17 = {
 		type: 'location',
diff --git a/test/e2e/fixtures/requests_1722637011/recording.har b/test/e2e/fixtures/requests_1722637011/recording.har
index 6d8614b2..601a072a 100644
--- a/test/e2e/fixtures/requests_1722637011/recording.har
+++ b/test/e2e/fixtures/requests_1722637011/recording.har
@@ -39368,6 +39368,142 @@
           "ssl": -1,
           "wait": 326
         }
+      },
+      {
+        "_id": "e53d1b456d5b350c0572302394c4c4fb",
+        "_order": 0,
+        "cache": {},
+        "request": {
+          "bodySize": 512,
+          "cookies": [],
+          "headers": [
+            {
+              "_fromType": "array",
+              "name": "content-type",
+              "value": "application/json"
+            },
+            {
+              "_fromType": "array",
+              "name": "accept-encoding",
+              "value": "gzip, br, deflate"
+            },
+            {
+              "_fromType": "array",
+              "name": "accept",
+              "value": "application/json"
+            },
+            {
+              "_fromType": "array",
+              "name": "user-agent",
+              "value": "public50c138-transpor50c138t/haf50c138as-client50c138:test"
+            },
+            {
+              "_fromType": "array",
+              "name": "connection",
+              "value": "keep-alive"
+            },
+            {
+              "_fromType": "array",
+              "name": "content-length",
+              "value": "512"
+            },
+            {
+              "name": "host",
+              "value": "reiseauskunft.bahn.de"
+            }
+          ],
+          "headersSize": 343,
+          "httpVersion": "HTTP/1.1",
+          "method": "POST",
+          "postData": {
+            "mimeType": "application/json",
+            "params": [],
+            "text": "{\"lang\":\"en\",\"svcReqL\":[{\"meth\":\"JourneyGeoPos\",\"req\":{\"maxJny\":256,\"onlyRT\":false,\"date\":\"20240222\",\"time\":\"160000\",\"rect\":{\"llCrd\":{\"x\":179000000,\"y\":-10000000},\"urCrd\":{\"x\":-179000000,\"y\":-8000000}},\"perSize\":30000,\"perStep\":10000,\"ageOfReport\":true,\"jnyFltrL\":[{\"type\":\"PROD\",\"mode\":\"INC\",\"value\":\"1023\"}],\"trainPosMode\":\"CALC\"},\"cfg\":{\"rtMode\":\"REALTIME\"}}],\"client\":{\"type\":\"AND\",\"id\":\"DB\",\"v\":21120000,\"name\":\"DB Navigator\"},\"ext\":\"DB.R21.12.a\",\"ver\":\"1.34\",\"auth\":{\"type\":\"AID\",\"aid\":\"n91dB8Z77MLdoR0K\"}}"
+          },
+          "queryString": [
+            {
+              "name": "checksum",
+              "value": "31be3d1db3730c00b04bc2c1f0fc35a6"
+            }
+          ],
+          "url": "https://reiseauskunft.bahn.de/bin/mgate.exe?checksum=31be3d1db3730c00b04bc2c1f0fc35a6"
+        },
+        "response": {
+          "bodySize": 375,
+          "content": {
+            "mimeType": "application/json; charset=utf-8",
+            "size": 375,
+            "text": "{\"ver\":\"1.34\",\"ext\":\"DB.R21.12.a\",\"lang\":\"eng\",\"id\":\"vw22fngkmwkj928g\",\"err\":\"OK\",\"cInfo\":{\"code\":\"OK\"},\"graph\":{\"id\":\"standard\",\"index\":0},\"subGraph\":{\"id\":\"global\",\"index\":0},\"view\":{\"id\":\"standard\",\"index\":0,\"type\":\"WGS84\"},\"svcResL\":[{\"meth\":\"JourneyGeoPos\",\"err\":\"OK\",\"res\":{\"date\":\"20240222\",\"time\":\"160000\",\"fpB\":\"20231210\",\"fpE\":\"20241214\",\"planrtTS\":\"1708893245\"}}]}"
+          },
+          "cookies": [
+            {
+              "expires": "2024-03-03T20:36:02.000Z",
+              "name": "AWSALB",
+              "path": "/",
+              "value": "J4t7tXbMG2lg31nXIBTJH3zo8sDRsTUIEnqOmiBhEoDtYGBpxR52hu2wfQP5+eCT0INYC8MaWym6BW20GoBKDszyAKMOExAMLZNzboW2HDerOk836by5gCycxCfp"
+            },
+            {
+              "expires": "2024-03-03T20:36:02.000Z",
+              "name": "AWSALBCORS",
+              "path": "/",
+              "sameSite": "None",
+              "secure": true,
+              "value": "J4t7tXbMG2lg31nXIBTJH3zo8sDRsTUIEnqOmiBhEoDtYGBpxR52hu2wfQP5+eCT0INYC8MaWym6BW20GoBKDszyAKMOExAMLZNzboW2HDerOk836by5gCycxCfp"
+            }
+          ],
+          "headers": [
+            {
+              "name": "date",
+              "value": "Sun, 25 Feb 2024 20:36:02 GMT"
+            },
+            {
+              "name": "content-type",
+              "value": "application/json; charset=utf-8"
+            },
+            {
+              "name": "content-length",
+              "value": 375
+            },
+            {
+              "name": "connection",
+              "value": "keep-alive"
+            },
+            {
+              "_fromType": "array",
+              "name": "set-cookie",
+              "value": "AWSALB=J4t7tXbMG2lg31nXIBTJH3zo8sDRsTUIEnqOmiBhEoDtYGBpxR52hu2wfQP5+eCT0INYC8MaWym6BW20GoBKDszyAKMOExAMLZNzboW2HDerOk836by5gCycxCfp; Expires=Sun, 03 Mar 2024 20:36:02 GMT; Path=/"
+            },
+            {
+              "_fromType": "array",
+              "name": "set-cookie",
+              "value": "AWSALBCORS=J4t7tXbMG2lg31nXIBTJH3zo8sDRsTUIEnqOmiBhEoDtYGBpxR52hu2wfQP5+eCT0INYC8MaWym6BW20GoBKDszyAKMOExAMLZNzboW2HDerOk836by5gCycxCfp; Expires=Sun, 03 Mar 2024 20:36:02 GMT; Path=/; SameSite=None; Secure"
+            },
+            {
+              "name": "server",
+              "value": "Apache"
+            },
+            {
+              "name": "strict-transport-security",
+              "value": "max-age=16070400; includeSubDomains"
+            }
+          ],
+          "headersSize": 622,
+          "httpVersion": "HTTP/1.1",
+          "redirectURL": "",
+          "status": 200,
+          "statusText": "OK"
+        },
+        "startedDateTime": "2024-02-25T20:35:53.142Z",
+        "time": 205,
+        "timings": {
+          "blocked": -1,
+          "connect": -1,
+          "dns": -1,
+          "receive": 0,
+          "send": 0,
+          "ssl": -1,
+          "wait": 205
+        }
       }
     ],
     "pages": [],