diff --git a/op-challenger/cmd/main_test.go b/op-challenger/cmd/main_test.go
index c749c68bc..6c4808798 100644
--- a/op-challenger/cmd/main_test.go
+++ b/op-challenger/cmd/main_test.go
@@ -7,7 +7,6 @@ import (
 	"time"
 
 	"github.com/ethereum-optimism/optimism/op-challenger/config"
-	"github.com/ethereum-optimism/optimism/op-node/chaincfg"
 	"github.com/ethereum-optimism/optimism/op-service/txmgr"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/log"
@@ -17,8 +16,8 @@ import (
 var (
 	l1EthRpc                = "http://example.com:8545"
 	gameFactoryAddressValue = "0xbb00000000000000000000000000000000000000"
-	cannonNetwork           = chaincfg.AvailableNetworks()[0]
-	otherCannonNetwork      = chaincfg.AvailableNetworks()[1]
+	cannonNetwork           = "op-mainnet"
+	otherCannonNetwork      = "op-goerli"
 	cannonBin               = "./bin/cannon"
 	cannonServer            = "./bin/op-program"
 	cannonPreState          = "./pre.json"
diff --git a/op-node/chaincfg/chains.go b/op-node/chaincfg/chains.go
index e864c93a9..34ded749f 100644
--- a/op-node/chaincfg/chains.go
+++ b/op-node/chaincfg/chains.go
@@ -33,14 +33,7 @@ var L2ChainIDToNetworkDisplayName = func() map[string]string {
 }()
 
 // AvailableNetworks returns the selection of network configurations that is available by default.
-// Other configurations that are part of the superchain-registry can be used with the --beta.network flag.
 func AvailableNetworks() []string {
-	return []string{"op-mainnet", "op-goerli", "op-sepolia"}
-}
-
-// BetaAvailableNetworks returns all available network configurations in the superchain-registry.
-// This set of configurations is experimental, and may change at any time.
-func BetaAvailableNetworks() []string {
 	var networks []string
 	for _, cfg := range superchain.OPChains {
 		networks = append(networks, cfg.Chain+"-"+cfg.Superchain)
@@ -48,20 +41,6 @@ func BetaAvailableNetworks() []string {
 	return networks
 }
 
-func IsAvailableNetwork(name string, beta bool) bool {
-	name = handleLegacyName(name)
-	available := AvailableNetworks()
-	if beta {
-		available = BetaAvailableNetworks()
-	}
-	for _, v := range available {
-		if v == name {
-			return true
-		}
-	}
-	return false
-}
-
 func handleLegacyName(name string) string {
 	switch name {
 	case "goerli":
@@ -91,7 +70,7 @@ func ChainByName(name string) *superchain.ChainConfig {
 func GetRollupConfig(name string) (*rollup.Config, error) {
 	chainCfg := ChainByName(name)
 	if chainCfg == nil {
-		return nil, fmt.Errorf("invalid network %s", name)
+		return nil, fmt.Errorf("invalid network: %q", name)
 	}
 	rollupCfg, err := rollup.LoadOPStackRollupConfig(chainCfg.ChainID)
 	if err != nil {
diff --git a/op-node/chaincfg/chains_test.go b/op-node/chaincfg/chains_test.go
index da08e6db9..f2db441a2 100644
--- a/op-node/chaincfg/chains_test.go
+++ b/op-node/chaincfg/chains_test.go
@@ -27,8 +27,6 @@ func TestGetRollupConfig(t *testing.T) {
 	}
 
 	for name, expectedCfg := range configsByName {
-		require.True(t, IsAvailableNetwork(name, false))
-
 		gotCfg, err := GetRollupConfig(name)
 		require.NoError(t, err)
 
diff --git a/op-node/flags/flags.go b/op-node/flags/flags.go
index fef9f7b15..f5aa45d2d 100644
--- a/op-node/flags/flags.go
+++ b/op-node/flags/flags.go
@@ -244,11 +244,10 @@ var (
 		Value:    false,
 	}
 	BetaExtraNetworks = &cli.BoolFlag{
-		Name: "beta.extra-networks",
-		Usage: fmt.Sprintf("Beta feature: enable selection of a predefined-network from the superchain-registry. "+
-			"The superchain-registry is experimental, and the availability of configurations may change."+
-			"Available networks: %s", strings.Join(chaincfg.BetaAvailableNetworks(), ", ")),
+		Name:    "beta.extra-networks",
+		Usage:   "Legacy flag, ignored, all superchain-registry networks are enabled by default.",
 		EnvVars: prefixEnvVars("BETA_EXTRA_NETWORKS"),
+		Hidden:  true, // hidden, this is deprecated, the flag is not used anymore.
 	}
 	RollupHalt = &cli.StringFlag{
 		Name:    "rollup.halt",
diff --git a/op-node/service.go b/op-node/service.go
index 2569e7af8..64c564cc5 100644
--- a/op-node/service.go
+++ b/op-node/service.go
@@ -188,6 +188,9 @@ func NewDriverConfig(ctx *cli.Context) *driver.Config {
 func NewRollupConfig(log log.Logger, ctx *cli.Context) (*rollup.Config, error) {
 	network := ctx.String(flags.Network.Name)
 	rollupConfigPath := ctx.String(flags.RollupConfig.Name)
+	if ctx.Bool(flags.BetaExtraNetworks.Name) {
+		log.Warn("The beta.extra-networks flag is deprecated and can be omitted safely.")
+	}
 	if network != "" {
 		if rollupConfigPath != "" {
 			log.Error(`Cannot configure network and rollup-config at the same time.
@@ -195,10 +198,6 @@ Startup will proceed to use the network-parameter and ignore the rollup config.
 Conflicting configuration is deprecated, and will stop the op-node from starting in the future.
 `, "network", network, "rollup_config", rollupConfigPath)
 		}
-		// check that the network is available
-		if !chaincfg.IsAvailableNetwork(network, ctx.Bool(flags.BetaExtraNetworks.Name)) {
-			return nil, fmt.Errorf("unavailable network: %q", network)
-		}
 		config, err := chaincfg.GetRollupConfig(network)
 		if err != nil {
 			return nil, err
diff --git a/op-program/host/cmd/main_test.go b/op-program/host/cmd/main_test.go
index 508f6033b..081136af1 100644
--- a/op-program/host/cmd/main_test.go
+++ b/op-program/host/cmd/main_test.go
@@ -75,7 +75,7 @@ func TestDefaultCLIOptionsMatchDefaultConfig(t *testing.T) {
 
 func TestNetwork(t *testing.T) {
 	t.Run("Unknown", func(t *testing.T) {
-		verifyArgsInvalid(t, "unavailable network: \"bar\"", replaceRequiredArg("--network", "bar"))
+		verifyArgsInvalid(t, "invalid network: \"bar\"", replaceRequiredArg("--network", "bar"))
 	})
 
 	t.Run("Required", func(t *testing.T) {