diff --git a/agentname.go b/agentname.go
index bce00b4..5f95437 100644
--- a/agentname.go
+++ b/agentname.go
@@ -3,6 +3,8 @@
 
 package main
 
+import "strings"
+
 // ---- what the running backend is called on screen ----
 //
 // Every user-visible mention of the agent goes through here. Before this, the
@@ -34,6 +36,14 @@ func agentTagline(backend string) string {
 	return "claude on your Max plan"
 }
 
+// agentDialString is the splash screen's dial-up line. Pure BBS flavour — ATDT
+// was the Hayes modem command to dial — but it names the agent, so it belongs
+// with the rest of the copy that does. Upper case because a 1980s board would
+// have printed it that way, and because the number is a joke about the name.
+func agentDialString(backend string) string {
+	return "ATDT 1-800-" + strings.ToUpper(agentName(backend)) + " . . ."
+}
+
 // promptPlaceholder is the empty-input hint.
 func promptPlaceholder(backend string) string {
 	return "Ask " + agentName(backend) + "…  (enter sends · alt+enter / ctrl+j / \\↵ for a new line)"
diff --git a/agentname_test.go b/agentname_test.go
index a860e17..c8f51c5 100644
--- a/agentname_test.go
+++ b/agentname_test.go
@@ -27,6 +27,12 @@ func TestAgentLabelsFollowTheBackend(t *testing.T) {
 		if got := agentTagline(c.backend); !strings.Contains(got, c.want) {
 			t.Errorf("tagline for %q = %q, want it to name %q", c.backend, got, c.want)
 		}
+		// The splash dials the agent by name, in caps. It reached this test late:
+		// a sweep for [Cc]laude cannot match CLAUDE, so the one all-caps mention
+		// in the program survived two passes that were looking straight at it.
+		if got := agentDialString(c.backend); !strings.Contains(got, strings.ToUpper(c.want)) {
+			t.Errorf("dial string for %q = %q, want it to name %q", c.backend, got, strings.ToUpper(c.want))
+		}
 	}
 	// The taglines name different plans, so one is not silently reused.
 	if agentTagline(backendClaude) == agentTagline(backendCodex) {
@@ -81,3 +87,15 @@ func TestCodexModelsFrameFillsThePicker(t *testing.T) {
 		t.Errorf("picker rows = %+v, want the reported model", items)
 	}
 }
+
+// The splash actually renders the dial line, so the helper cannot drift from
+// what is drawn.
+func TestSplashDialsTheRunningBackend(t *testing.T) {
+	out := stripANSI(splashScreen(90, 0, splashFinalFrame, 0, backendCodex))
+	if !strings.Contains(out, "1-800-CODEX") {
+		t.Errorf("codex splash should dial CODEX, got:\n%s", out)
+	}
+	if strings.Contains(out, "CLAUDE") {
+		t.Errorf("codex splash still names claude:\n%s", out)
+	}
+}
diff --git a/asset_gen_test.go b/asset_gen_test.go
index c4f3313..4e0fc01 100644
--- a/asset_gen_test.go
+++ b/asset_gen_test.go
@@ -80,7 +80,7 @@ func TestGenerateThemeAssets(t *testing.T) {
 // genSplashScreen renders the boot screen at its final reveal frame. height 0
 // returns the bare content (no vertical centering), so the image is compact.
 func genSplashScreen() string {
-	return splashScreen(90, 0, splashFinalFrame, 0)
+	return splashScreen(90, 0, splashFinalFrame, 0, backendClaude)
 }
 
 // previewModel builds a real model mid-turn — a user request, a plain reply,
diff --git a/splash.go b/splash.go
index c061de1..40e26f6 100644
--- a/splash.go
+++ b/splash.go
@@ -84,7 +84,7 @@ func centerBlock(lines []string, width int, style lipgloss.Style) []string {
 // modem handshake, a scene divider, a SAUCE-style credit, and a logon prompt.
 // Sections reveal one frame at a time so the boot looks like a real modem
 // negotiation; the first keypress dismisses it regardless of progress.
-func splashScreen(width, height, frame, logoIdx int) string {
+func splashScreen(width, height, frame, logoIdx int, backend string) string {
 	if width < 44 {
 		width = 44
 	}
@@ -102,7 +102,7 @@ func splashScreen(width, height, frame, logoIdx int) string {
 		)
 	}
 	if frame >= 3 {
-		lines = append(lines, center(cDim.Render("ATDT 1-800-CLAUDE . . .")))
+		lines = append(lines, center(cDim.Render(agentDialString(backend))))
 	}
 	if frame >= 4 {
 		lines = append(lines, center(dAdd.Render("CONNECT 57600/ARQ/V.42bis/LAPM")))
diff --git a/view.go b/view.go
index 465d066..e3ddc29 100644
--- a/view.go
+++ b/view.go
@@ -17,7 +17,7 @@ func (m model) View() string {
 		return "starting…"
 	}
 	if m.splash {
-		return splashScreen(m.w, m.h, m.splashFrame, m.logoIdx)
+		return splashScreen(m.w, m.h, m.splashFrame, m.logoIdx, m.backend)
 	}
 	bg := m.renderBackground()
 	// Modal overlays float on top of the live transcript via placeOverlay