diff --git a/registries/_format/uint16.md b/registries/_format/uint16.md
new file mode 100644
index 0000000000..f65e0abe91
--- /dev/null
+++ b/registries/_format/uint16.md
@@ -0,0 +1,15 @@
+---
+owner: baywet
+issue: 4564
+description: unsigned 16-bit integer
+base_type: number
+layout: default
+source: https://spec.openapis.org/oas/latest.html#data-types
+source_label: OAS
+---
+
+{% capture summary %}
+The `{{page.slug}}` format represents an unsigned 16-bit integer, with the range 0 to 65535.
+{% endcapture %}
+
+{% include format-entry.md summary=summary %}
diff --git a/registries/_format/uint32.md b/registries/_format/uint32.md
new file mode 100644
index 0000000000..10e9ef2ad4
--- /dev/null
+++ b/registries/_format/uint32.md
@@ -0,0 +1,15 @@
+---
+owner: baywet
+issue: 4564
+description: unsigned 32-bit integer
+base_type: number
+layout: default
+source: https://spec.openapis.org/oas/latest.html#data-types
+source_label: OAS
+---
+
+{% capture summary %}
+The `{{page.slug}}` format represents an unsigned 32-bit integer, with the range 0 to 4294967295.
+{% endcapture %}
+
+{% include format-entry.md summary=summary %}
diff --git a/registries/_format/uint64.md b/registries/_format/uint64.md
new file mode 100644
index 0000000000..03c8d4ca0a
--- /dev/null
+++ b/registries/_format/uint64.md
@@ -0,0 +1,17 @@
+---
+owner: baywet
+issue: 4564
+description: unsigned 64-bit integer
+base_type: [number, string]
+layout: default
+source: https://spec.openapis.org/oas/latest.html#data-types
+source_label: OAS
+---
+
+{% capture summary %}
+The `{{page.slug}}` format represents an unsigned 64-bit integer, with the range 0 to 18446744073709551615.
+
+Representation as a JSON string is recommended for values outside the 53-bit range (0 through 9007199254740991) as this avoids problems with recipients that parse JSON numbers into [binary64](https://en.wikipedia.org/wiki/Double-precision_floating-point_format) memory representation.
+{% endcapture %}
+
+{% include format-entry.md summary=summary %}