diff --git a/openbsc/include/openbsc/gprs_sgsn.h b/openbsc/include/openbsc/gprs_sgsn.h
index 4bbde9c..06187f0 100644
--- a/openbsc/include/openbsc/gprs_sgsn.h
+++ b/openbsc/include/openbsc/gprs_sgsn.h
@@ -312,6 +312,9 @@
 
 	uint8_t			msisdn[9];
 	size_t			msisdn_len;
+
+	uint8_t			hlr[9];
+	size_t			hlr_len;
 };
 
 #define SGSN_ERROR_CAUSE_NONE (-1)
diff --git a/openbsc/src/gprs/gprs_subscriber.c b/openbsc/src/gprs/gprs_subscriber.c
index c2a3ae1..8231e8c 100644
--- a/openbsc/src/gprs/gprs_subscriber.c
+++ b/openbsc/src/gprs/gprs_subscriber.c
@@ -276,6 +276,18 @@
 		}
 	}
 
+	if (gsup_msg->hlr_enc) {
+		if (gsup_msg->hlr_enc_len > sizeof(sdata->hlr)) {
+			LOGP(DGPRS, LOGL_ERROR, "HLR-Number too long (%zu)\n",
+				gsup_msg->hlr_enc_len);
+			sdata->hlr_len = 0;
+		} else {
+			memcpy(sdata->hlr, gsup_msg->hlr_enc,
+				gsup_msg->hlr_enc_len);
+			sdata->hlr_len = gsup_msg->hlr_enc_len;
+		}
+	}
+
 	if (gsup_msg->pdp_info_compl) {
 		rc = gprs_subscr_pdp_data_clear(subscr);
 		if (rc > 0)
@@ -666,11 +678,17 @@
 
 int gprs_subscr_purge(struct gsm_subscriber *subscr)
 {
+	struct sgsn_subscriber_data *sdata = subscr->sgsn_data;
 	struct gprs_gsup_message gsup_msg = {0};
 
 	LOGGSUBSCRP(LOGL_INFO, subscr, "purging MS subscriber\n");
 
 	gsup_msg.message_type = GPRS_GSUP_MSGT_PURGE_MS_REQUEST;
+
+	/* Provide the HLR number in case it is known */
+	gsup_msg.hlr_enc_len = sdata->hlr_len;
+	gsup_msg.hlr_enc = sdata->hlr;
+
 	return gprs_subscr_tx_gsup_message(subscr, &gsup_msg);
 }
 
diff --git a/openbsc/tests/sgsn/sgsn_test.c b/openbsc/tests/sgsn/sgsn_test.c
index 879dfe3..a06c153 100644
--- a/openbsc/tests/sgsn/sgsn_test.c
+++ b/openbsc/tests/sgsn/sgsn_test.c
@@ -1155,6 +1155,8 @@
 			0x12, 0x09, 0x04, 't', 'e', 's', 't', 0x03, 'a', 'p', 'n',
 		0x08, 0x07, /* MSISDN 49166213323 encoded */
 			0x91, 0x94, 0x61, 0x26, 0x31, 0x23, 0xF3,
+		0x09, 0x07, /* MSISDN 38166213323 encoded */
+			0x91, 0x83, 0x61, 0x26, 0x31, 0x23, 0xF3,
 	};
 
 	OSMO_ASSERT(!mmctx || mmctx->subscr);