diff --git a/pjlib/src/pj/ip_helper_generic.c b/pjlib/src/pj/ip_helper_generic.c
index d7bbf725e..3d64146df 100644
--- a/pjlib/src/pj/ip_helper_generic.c
+++ b/pjlib/src/pj/ip_helper_generic.c
@@ -116,6 +116,16 @@ static pj_status_t if_enum_by_af(int af,
 	    continue; /* Skip when interface is down */
 	}
 
+	/* Ignore 192.0.0.0/29 address. cf https://datatracker.ietf.org/doc/html/rfc7335#section-4
+	 */
+	if (af==pj_AF_INET() &&
+	    (pj_ntohl(((pj_sockaddr_in*)ad)->sin_addr.s_addr) >> 4) == 201326592 /* 0b1100000000000000000000000000 which is 192.0.0.0 >> 4 */)
+	{
+	    TRACE_((THIS_FILE, "  address %s ignored (192.0.0.0/29 class)",
+		    get_addr(ad), ad->sa_family));
+	    continue;
+	}
+
 	/* Ignore 0.0.0.0/8 address. This is a special address
 	 * which doesn't seem to have practical use.
 	 */
@@ -215,6 +225,16 @@ static pj_status_t if_enum_by_af(int af,
 	}
 #endif
 
+	/* Ignore 192.0.0.0/29 address. cf https://datatracker.ietf.org/doc/html/rfc7335#section-4
+	 */
+	if (af==pj_AF_INET() &&
+	    (pj_ntohl(((pj_sockaddr_in*)ad)->sin_addr.s_addr) >> 4) == 201326592 /* 0b1100000000000000000000000000 which is 192.0.0.0 >> 4 */)
+	{
+	    TRACE_((THIS_FILE, "  address %s ignored (192.0.0.0/29 class)",
+		    get_addr(ad), ad->sa_family));
+	    continue;
+	}
+
 	/* Ignore 0.0.0.0/8 address. This is a special address
 	 * which doesn't seem to have practical use.
 	 */
@@ -309,6 +329,16 @@ static pj_status_t if_enum_by_af(int af, unsigned *p_cnt, pj_sockaddr ifs[])
 	    continue;	/* Not address family that we want, continue */
 	}
 
+	/* Ignore 192.0.0.0/29 address. cf https://datatracker.ietf.org/doc/html/rfc7335#section-4
+	 */
+	if (af==pj_AF_INET() &&
+	    (pj_ntohl(((pj_sockaddr_in*)ad)->sin_addr.s_addr) >> 4) == 201326592 /* 0b1100000000000000000000000000 which is 192.0.0.0 >> 4 */)
+	{
+	    TRACE_((THIS_FILE, "  address %s ignored (192.0.0.0/29 class)",
+		    get_addr(ad), ad->sa_family));
+	    continue;
+	}
+
 	/* Ignore 0.0.0.0/8 address. This is a special address
 	 * which doesn't seem to have practical use.
 	 */
