A /21 IPv4 block contains 2,048 IP addresses and typically costs between $51,200 - $71,700. IPv4 blocks of this size can be purchased from ipv4.center, which supports transfers across all five RIR regions — RIPE NCC, ARIN, APNIC, LACNIC, and AFRINIC. Per-IP pricing for a /21 block ranges from $25 - $35, varying by registry and current market demand. All purchases include blacklist verification, BGP history checks, managed RIR transfer, and secure escrow payment protection.
/21 IPv4 Pricing by Region
Approximate pricing for a /21 block (2,048 IPs) across all Regional Internet Registries
| RIR Region | /21 Block Price Range | Transfer Time |
|---|---|---|
RIPE NCC Europe, Middle East, Central Asia | $55,300 – $71,700 | 1–2 weeks |
ARIN North America | $53,200 – $69,600 | 2–4 weeks |
APNIC Asia Pacific | $53,200 – $69,600 | 2–3 weeks |
LACNIC Latin America & Caribbean | $45,100 – $65,500 | 3–5 weeks |
AFRINIC Africa | $41,000 – $51,200 | 3–5 weeks |
Prices are approximate and subject to market conditions. Visit the marketplace for real-time pricing. Last updated March 2026.
What's Included with Every /21 Purchase
Every IPv4 block purchased through ipv4.center comes with comprehensive verification and transfer support
Blacklist-Free Guarantee
Screened against 300+ blacklist providers including Spamhaus, SURBL, and Barracuda.
Clean BGP History
No hijacking incidents, unauthorized announcements, or suspicious routing activity.
Managed RIR Transfer
Full transfer management — contracts, documentation, RIR submission, and post-transfer verification.
All RIR Regions
RIPE NCC, ARIN, APNIC, LACNIC, and AFRINIC transfers supported worldwide.
Fast Delivery
RIPE transfers in 1–2 weeks, ARIN 2–4 weeks, APNIC 2–3 weeks. Expedited when possible.
Dedicated Support
Personal account manager for the entire transaction lifecycle, from selection to deployment.
Other IPv4 Subnet Sizes
Browse all available IPv4 block sizes on ipv4.center
/21 IPv4 Block FAQ
Frequently asked questions about buying a /21 IPv4 subnet
What is a /21 IPv4 block?
What is a /21 IPv4 block?
A /21 IPv4 block contains 2,048 IP addresses (eight contiguous /24 blocks). It is a mid-size allocation commonly used by growing ISPs, regional hosting providers, and enterprises with substantial IP requirements for cloud infrastructure, VPN services, or CDN deployments.
How much does a /21 IPv4 block cost?
How much does a /21 IPv4 block cost?
A /21 IPv4 block (2,048 IPs) typically costs between $51,200 and $71,700 depending on RIR region and market conditions. Per-IP pricing ranges from $25 to $35, consistent with other blocks in the /24 to /21 size range.
Who typically buys /21 IPv4 blocks?
Who typically buys /21 IPv4 blocks?
Typical buyers of /21 blocks include mid-size ISPs expanding their customer base, hosting companies scaling their infrastructure, enterprises deploying cloud or CDN services, and VPN providers needing diverse IP ranges. The 2,048-address capacity offers a meaningful step up from /22 blocks.