diff --git a/src/test/netbase_tests.cpp b/src/test/netbase_tests.cpp
index a088bf9df7b..996f25869bd 100644
--- a/src/test/netbase_tests.cpp
+++ b/src/test/netbase_tests.cpp
@@ -19,6 +19,7 @@
 #include <boost/test/unit_test.hpp>
 
 using namespace std::literals;
+using namespace util::hex_literals;
 
 BOOST_FIXTURE_TEST_SUITE(netbase_tests, BasicTestingSetup)
 
@@ -610,4 +611,56 @@ BOOST_AUTO_TEST_CASE(isbadport)
     BOOST_CHECK_EQUAL(std::ranges::count_if(ports, IsBadPort), 85);
 }
 
+
+BOOST_AUTO_TEST_CASE(asmap_test_vectors)
+{
+    // Randomly generated encoded ASMap with 128 ranges, up to 20-bit AS numbers.
+    constexpr auto ASMAP_DATA{
+        "fd38d50f7d5d665357f64bba6bfc190d6078a7e68e5d3ac032edf47f8b5755f87881bfd3633d9aa7c1fa279b3"
+        "6fe26c63bbc9de44e0f04e5a382d8e1cddbe1c26653bc939d4327f287e8b4d1f8aff33176787cb0ff7cb28e3f"
+        "daef0f8f47357f801c9f7ff7a99f7f9c9f99de7f3156ae00f23eb27a303bc486aa3ccc31ec19394c2f8a53ddd"
+        "ea3cc56257f3b7e9b1f488be9c1137db823759aa4e071eef2e984aaf97b52d5f88d0f373dd190fe45e06efef1"
+        "df7278be680a73a74c76db4dd910f1d30752c57fe2bc9f079f1a1e1b036c2a69219f11c5e11980a3fa51f4f82"
+        "d36373de73b1863a8c27e36ae0e4f705be3d76ecff038a75bc0f92ba7e7f6f4080f1c47c34d095367ecf4406c"
+        "1e3bbc17ba4d6f79ea3f031b876799ac268b1e0ea9babf0f9a8e5f6c55e363c6363df46afc696d7afceaf49b6"
+        "e62df9e9dc27e70664cafe5c53df66dd0b8237678ada90e73f05ec60e6f6e96c3cbb1ea2f9dece115d5bdba10"
+        "33e53662a7d72a29477b5beb35710591d3e23e5f0379baea62ffdee535bcdf879cbf69b88d7ea37c8015381cf"
+        "63dc33d28f757a4a5e15d6a08"_hex};
+
+    // Convert to std::vector<bool> format that the ASMap interpreter uses.
+    std::vector<bool> asmap_bits;
+    asmap_bits.reserve(ASMAP_DATA.size() * 8);
+    for (auto byte : ASMAP_DATA) {
+        for (int bit = 0; bit < 8; ++bit) {
+            asmap_bits.push_back((std::to_integer<uint8_t>(byte) >> bit) & 1);
+        }
+    }
+
+    // Construct NetGroupManager with this data.
+    NetGroupManager netgroup{std::move(asmap_bits)};
+    BOOST_CHECK(netgroup.UsingASMap());
+
+    // Check some randomly-generated IPv6 addresses in it (biased towards the very beginning and
+    // very end of the 128-bit range).
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("0:1559:183:3728:224c:65a5:62e6:e991", false)), 961340);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("d0:d493:faa0:8609:e927:8b75:293c:f5a4", false)), 961340);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("2a0:26f:8b2c:2ee7:c7d1:3b24:4705:3f7f", false)), 693761);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("a77:7cd4:4be5:a449:89f2:3212:78c6:ee38", false)), 0);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("1336:1ad6:2f26:4fe3:d809:7321:6e0d:4615", false)), 672176);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("1d56:abd0:a52f:a8d5:d5a7:a610:581d:d792", false)), 499880);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("378e:7290:54e5:bd36:4760:971c:e9b9:570d", false)), 0);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("406c:820b:272a:c045:b74e:fc0a:9ef2:cecc", false)), 248495);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("46c2:ae07:9d08:2d56:d473:2bc7:57e3:20ac", false)), 248495);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("50d2:3db6:52fa:2e7:12ec:5bc4:1bd1:49f9", false)), 124471);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("53e1:1812:ffa:dccf:f9f2:64be:75fa:795", false)), 539993);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("544d:eeba:3990:35d1:ad66:f9a3:576d:8617", false)), 374443);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("6a53:40dc:8f1d:3ffa:efeb:3aa3:df88:b94b", false)), 435070);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("87aa:d1c9:9edb:91e7:aab1:9eb9:baa0:de18", false)), 244121);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("9f00:48fa:88e3:4b67:a6f3:e6d2:5cc1:5be2", false)), 862116);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("c49f:9cc6:86ad:ba08:4580:315e:dbd1:8a62", false)), 969411);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("dff5:8021:61d:b17d:406d:7888:fdac:4a20", false)), 969411);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("e888:6791:2960:d723:bcfd:47e1:2d8c:599f", false)), 824019);
+    BOOST_CHECK_EQUAL(netgroup.GetMappedAS(*LookupHost("ffff:d499:8c4b:4941:bc81:d5b9:b51e:85a8", false)), 824019);
+}
+
 BOOST_AUTO_TEST_SUITE_END()