diff --git a/packages/providers/src.ts/base-provider.ts b/packages/providers/src.ts/base-provider.ts
index 516456922c..41433bd635 100644
--- a/packages/providers/src.ts/base-provider.ts
+++ b/packages/providers/src.ts/base-provider.ts
@@ -619,8 +619,19 @@ export class BaseProvider extends Provider {
     }
 
     _getBlock(blockHashOrBlockTag: BlockTag | string | Promise<BlockTag | string>, includeTransactions?: boolean): Promise<Block | BlockWithTransactions> {
+        if (blockHashOrBlockTag instanceof Promise) {
+            return blockHashOrBlockTag.then((b) => this._getBlock(b, includeTransactions));
+        }
+
         return this.ready.then(() => {
-            return this._getBlockTag(blockHashOrBlockTag).then((blockHashOrBlockTag) => {
+            let blockHashOrBlockTagPromise: Promise<string | BlockTag> = null;
+            if (isHexString(blockHashOrBlockTag, 32)) {
+                blockHashOrBlockTagPromise = Promise.resolve(blockHashOrBlockTag);
+            } else {
+                blockHashOrBlockTagPromise = this._getBlockTag(blockHashOrBlockTag);
+            }
+
+            return blockHashOrBlockTagPromise.then((blockHashOrBlockTag) => {
                 let params: { [key: string]: any } = {
                     includeTransactions: !!includeTransactions
                 };
diff --git a/packages/tests/src.ts/test-providers.ts b/packages/tests/src.ts/test-providers.ts
index 1411d3d463..3cfee58b96 100644
--- a/packages/tests/src.ts/test-providers.ts
+++ b/packages/tests/src.ts/test-providers.ts
@@ -507,3 +507,16 @@ describe("Test Basic Authentication", function() {
         }, "throws an exception for insecure connections");
     })
 });
+
+describe("Test #629", function() {
+    it("Fetches a blockhash beginning with a 0 nibble", function() {
+        const provider = new ethers.providers.InfuraProvider('goerli');
+        return provider.getBlock('0x0f305466552efa183a0de26b6fda26d55a872dbc02aca8b5852cc2a361ce9ee4').then((block) => {
+            assert.equal(block.parentHash, "0x6723e880e01c15c5ac894abcae0f5b55ea809a31eaf5618998928f7d9cbc5118");
+            assert.equal(block.number, 1479831);
+            assert.equal(block.transactions.length, 5);
+        }, (error) => {
+            assert.ok(false, "Failed to get block");
+        });
+    });
+});