diff --git a/packages/beacon-node/src/api/impl/config/constants.ts b/packages/beacon-node/src/api/impl/config/constants.ts
index 087ff9515003..ee0eb40a80ae 100644
--- a/packages/beacon-node/src/api/impl/config/constants.ts
+++ b/packages/beacon-node/src/api/impl/config/constants.ts
@@ -19,6 +19,7 @@ import {
   DOMAIN_CONTRIBUTION_AND_PROOF,
   DOMAIN_BLS_TO_EXECUTION_CHANGE,
   DOMAIN_APPLICATION_BUILDER,
+  DOMAIN_BLOBS_SIDECAR,
   TIMELY_SOURCE_FLAG_INDEX,
   TIMELY_TARGET_FLAG_INDEX,
   TIMELY_HEAD_FLAG_INDEX,
@@ -94,4 +95,7 @@ export const specConstants = {
 
   // ## Capella domain types
   DOMAIN_BLS_TO_EXECUTION_CHANGE,
+
+  // ## EIP-4844 domain types
+  DOMAIN_BLOBS_SIDECAR,
 };
diff --git a/packages/params/src/index.ts b/packages/params/src/index.ts
index 70c620a2fffb..c335bcb35fe6 100644
--- a/packages/params/src/index.ts
+++ b/packages/params/src/index.ts
@@ -126,6 +126,9 @@ export const DOMAIN_SYNC_COMMITTEE = Uint8Array.from([7, 0, 0, 0]);
 export const DOMAIN_SYNC_COMMITTEE_SELECTION_PROOF = Uint8Array.from([8, 0, 0, 0]);
 export const DOMAIN_CONTRIBUTION_AND_PROOF = Uint8Array.from([9, 0, 0, 0]);
 export const DOMAIN_BLS_TO_EXECUTION_CHANGE = Uint8Array.from([10, 0, 0, 0]);
+// https://github.com/ethereum/consensus-specs/blob/dev/specs/eip4844/beacon-chain.md#domain-types
+// TODO EIP-4844: Is this still used when coupling blobs and blocks?
+export const DOMAIN_BLOBS_SIDECAR = Uint8Array.from([11, 0, 0, 0]);
 
 // Application specific domains
 
@@ -173,10 +176,6 @@ export const SYNC_COMMITTEE_SUBNET_SIZE = Math.floor(SYNC_COMMITTEE_SIZE / SYNC_
 
 export const MAX_REQUEST_BLOCKS = 2 ** 10; // 1024
 
-// // EIP-4844
-// export const FIELD_ELEMENTS_PER_BLOB = 4096;
-// export const MAX_BLOBS_PER_BLOCK = 16;
-
 // Lightclient pre-computed
 /**
  * ```ts