パブリック委任プレフィックスまたはサブプレフィックスから作成する IP アドレスは静的外部 IP アドレスで、リージョンまたはグローバルに設定できます。パブリック委任プレフィックスまたはサブプレフィックス内の IP アドレスは、すべて使用できます。予約済みのネットワーク アドレスやブロードキャスト アドレスはありません。たとえば、/28 パブリック委任プレフィックスまたはサブプレフィックスから IP アドレスを作成すると、16 個の IP アドレス リソースが作成されます。
すべての静的外部 IP アドレスを一覧表示できます。このリストには、 Google Cloudに追加した IP アドレスと、 Google Cloudから提供された IP アドレスが含まれます。
[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["わかりにくい","hardToUnderstand","thumb-down"],["情報またはサンプルコードが不正確","incorrectInformationOrSampleCode","thumb-down"],["必要な情報 / サンプルがない","missingTheInformationSamplesINeed","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2025-09-04 UTC。"],[],[],null,["# Create IPv4 sub-prefixes and IPv4 addresses\n===========================================\n\nThis page describes how to divide your IPv4 public delegated prefix and create\nBYOIP addresses to use with Google Cloud resources. You can create IPv4\nBYOIP addresses from a public delegated prefix or sub-prefix.\n\nIf you want to divide an IPv6 public delegated prefix, see [Create IPv6\nsub-prefixes](/vpc/docs/create-ipv6-sub-prefixes).\n\nBefore you begin\n----------------\n\n1. Create an IPv4 [public advertised prefix](/vpc/docs/create-pap).\n2. Create an IPv4 [public delegated prefix](/vpc/docs/create-pdp).\n\n### Roles\n\n\nTo get the permissions that\nyou need to complete the tasks in this guide,\n\nask your administrator to grant you the\n\n\n[Compute Public IP Admin](/iam/docs/roles-permissions/compute#compute.publicIpAdmin) (`roles/compute.publicIpAdmin`)\nIAM role on your project.\n\n\nFor more information about granting roles, see [Manage access to projects, folders, and organizations](/iam/docs/granting-changing-revoking-access).\n\n\nYou might also be able to get\nthe required permissions through [custom\nroles](/iam/docs/creating-custom-roles) or other [predefined\nroles](/iam/docs/roles-overview#predefined).\n\nCreate sub-prefixes\n-------------------\n\nYou can divide a public delegated prefix into smaller IP address ranges by\ncreating a sub-prefix. A sub-prefix is a public delegated prefix that has a\npublic delegated prefix parent.\n\nA sub-prefix name can't be changed without deleting and recreating the resource.\nFor this reason, we recommend that you create generic names that won't need to\nchange---for example, `sub-203-0-113-0-28`, where `sub` denotes the resource\ntype and `203-0-113-0-28` denotes the specific prefix and prefix length.\n\nA public delegated prefix can be sub-delegated up to three times from a public\nadvertised prefix. For example, if you have a public advertised prefix with IP\naddress range `203.0.113.0/24`, you can do the following:\n\n- Create a public delegated prefix with IP address range `203.0.113.0/25` from the public advertised prefix.\n- Create a sub-prefix with IP address range `203.0.113.0/26` that has the previous public delegated prefix as its parent.\n- Create a sub-prefix with IP address range `203.0.113.0/27` that has the previous sub-prefix as its parent.\n\nAt this point, you cannot create further sub-prefixes that have the\n`203.0.113.0/27` sub-prefix as a parent. \n\n### Console\n\n1. In the Google Cloud console, go to **Bring your own IP**.\n\n [Go to Bring your own IP](https://console.cloud.google.com/networking/byoip)\n2. Click the public delegated prefix that you want to subdivide.\n\n3. Click **Create sub-prefix**.\n\n4. Enter a **Name** and optional **Description** for the sub-prefix.\n\n5. Select a **Prefix length** for the sub-prefix.\n\n6. Select **IP addresses** for the sub-prefix.\n\n7. Select a **Project** for the sub-prefix. The IP addresses are made\n available in this project only.\n\n8. Click **Create**.\n\n### gcloud\n\nTo create a sub-prefix from a public delegated prefix, use the\n[`public-delegated-prefixes delegated-sub-prefixes create`\ncommand](/sdk/gcloud/reference/compute/public-delegated-prefixes/delegated-sub-prefixes/create) \n\n```\ngcloud compute public-delegated-prefixes \\\n delegated-sub-prefixes \\\n create SUB_PREFIX_NAME \\\n --range=SUB_PREFIX_RANGE \\\n --public-delegated-prefix=PDP_NAME \\\n --public-delegated-prefix-region=PDP_REGION \\\n --delegatee-project=PROJECT_ID\n```\n\nReplace the following:\n\n- \u003cvar translate=\"no\"\u003eSUB_PREFIX_NAME\u003c/var\u003e: a name for the sub-prefix that you\n are creating.\n\n- \u003cvar translate=\"no\"\u003eSUB_PREFIX_RANGE\u003c/var\u003e: the IP address range for the\n sub-prefix that you are creating.\n\n- \u003cvar translate=\"no\"\u003ePDP_NAME\u003c/var\u003e: the parent public delegated prefix or\n sub-prefix that contains the sub-prefix you are creating.\n\n- \u003cvar translate=\"no\"\u003ePDP_REGION\u003c/var\u003e: the region of the public delegated prefix\n or sub-prefix that contains the sub-prefix you are creating.\n\n- \u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e: an optional project ID for the\n sub-prefix. The following describes the behavior for this value:\n\n - If you specify a value, the IP addresses are available only in the\n specified project.\n\n - If you don't use `--delegatee-project`, the IP addresses are\n available in the same project as the sub-prefix's parent public\n delegated prefix or sub-prefix.\n\nList prefixes\n-------------\n\nYou can list all public advertised prefixes and public delegated prefixes\n(including sub-prefixes) in a project. \n\n### Console\n\n1. In the Google Cloud console, go to **Bring your own IP**.\n\n [Go to Bring your own IP](https://console.cloud.google.com/networking/byoip)\n2. All public advertised prefixes, public delegated prefixes, and\n sub-prefixes are displayed.\n\n### gcloud\n\nTo list public delegated prefixes, including sub-prefixes, use the\n[`public-delegated-prefixes list`\ncommand](/sdk/gcloud/reference/compute/public-delegated-prefixes/list). \n\n```\ngcloud compute public-delegated-prefixes list\n```\n\nCreate IP addresses\n-------------------\n\nWhen you create addresses from a public delegated prefix or sub-prefix, you\ncannot further sub-divide that prefix.\n\nThe [IP addresses](/vpc/docs/ip-addresses) that you create from a public\ndelegated prefix or sub-prefix are static external IP addresses and can be\nregional or global. All IP addresses in the public delegated prefix or\nsub-prefix are made available; there is no reserved network address or broadcast\naddress. For example, if you create IP addresses from a `/28` public delegated\nprefix or sub-prefix, 16 IP address resources are created.\n\nYou can [list all static external IP\naddresses](/compute/docs/ip-addresses/reserve-static-external-ip-address#list_ip).\nThis list includes IP addresses that you have brought to Google Cloud\nand IP addresses that are provided by Google Cloud.\n\nBYOIP addresses are created with names in a consistent format. For example,\n`203.0.113.144` is assigned the name `address-203-0-113-144`. \n\n### Console\n\n1. In the Google Cloud console, go to **Bring your own IP**.\n\n [Go to Bring your own IP](https://console.cloud.google.com/networking/byoip)\n2. Click the public delegated prefix or sub-prefix that you want to create\n IP addresses in.\n\n3. Click **Create addresses**.\n\n4. Select the **Prefix length**.\n\n5. Select the range of **IP addresses** you want to create.\n\n6. Click **Create addresses**.\n\n### gcloud\n\nTo create IP addresses from a public delegated prefix or sub-prefix, use the\n[`public-delegated-prefixes delegated-sub-prefixes create`\ncommand](/sdk/gcloud/reference/compute/public-delegated-prefixes/delegated-sub-prefixes/create). \n\n```\ngcloud compute public-delegated-prefixes \\\n delegated-sub-prefixes \\\n create ADDRESSES_NAME \\\n --create-addresses \\\n --public-delegated-prefix=PDP_NAME \\\n --public-delegated-prefix-region=PDP_REGION\n```\n\nReplace the following:\n\n- \u003cvar translate=\"no\"\u003eADDRESSES_NAME\u003c/var\u003e: a name for the group of addresses\n that you are creating.\n\n- \u003cvar translate=\"no\"\u003ePDP_NAME\u003c/var\u003e: the public delegated prefix or sub-prefix\n that you are creating IP addresses for.\n\n- \u003cvar translate=\"no\"\u003ePDP_REGION\u003c/var\u003e: the region of the public delegated prefix\n or sub-prefix that you are creating IP addresses for.\n\nWhat's next\n-----------\n\n- [Manage BGP announcement (v2)](/vpc/docs/manage-bgp-announcement)"]]
