1 files changed, 7 insertions, 0 deletions
diff --git a/src/main.zig b/src/main.zig
index 6bb9777..77baae8 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -79,6 +79,13 @@ pub fn main(init: std.process.Init) !u8 {
     if (ceps.items.len == 1) {
         var address = client.lookup(ceps.items[0], .{ .diagnostics = &diag }) catch |err| {
             try out.print("{s}: {t}: {s}\n", .{ ceps.items[0], err, diag.message() });
+            // Not an address — the lookup failed. Only where the number would
+            // have landed, which is usually the useful thing to say back.
+            if (diag.faixa()) |faixa| {
+                try out.print("  would be in {s}/{s}, which has {d} CEPs between {s} and {s}\n", .{
+                    faixa.localidade, faixa.uf, faixa.ceps, faixa.cep_ini, faixa.cep_fim,
+                });
+            }
             return 1;
         };
         defer address.deinit(gpa);