IPv4 Transfers December 2021

In December 2021, the five Regional Internet Registries recorded 1,853 transfers: 6,742,528 IPv4 addresses in 1,412 blocks, plus 231 IPv6 blocks and 210 AS numbers. 98 transfers moved resources between two registries. Dates are the dates the registry processed the transfer.

IPv4 addresses transferred
6.7M
1,412 IPv4 blocks
Registry transfers
1,853
231 IPv6 / 210 ASN
Inter-RIR transfers
98
515K IPv4 addresses (8%)
Mergers and acquisitions
425
1,428 market transfers

Transfer Volume by RIR

Transfers counted at the receiving registry. Inter-RIR columns show IPv4 that entered or left the region.

Transfers per Regional Internet Registry, December 2021
RegistryTransfersIPv4 receivedInter-RIR inInter-RIR out
ARIN3963,959,29639,680399,616
RIPE NCC1,3891,476,352416,00019,968
APNIC591,283,07251,20094,208
LACNIC923,8088,1921,280

Inter-RIR Transfers December 2021

IPv4 addresses moved from one registry to another. All inter-RIR transfers

IPv4 addresses transferred between Regional Internet Registries
From ↓ / To →RIPE NCCARINAPNICLACNICAFRINIC
RIPE NCC-
18K
11 transfers
2,048
6 transfers
00
ARIN
342K
25 transfers
-
49K
6 transfers
8,192
1 transfers
0
APNIC
73K
41 transfers
22K
6 transfers
-00
LACNIC
1,024
1 transfers
256
1 transfers
0-0
AFRINIC0000-

IPv4 Transfers by Block Size

Number of transferred IPv4 blocks per prefix length.

IPv4 transfers by prefix length, December 2021
Prefix lengthAddresses per blockBlocksShare of blocksIPv4 addresses
/13524,28810.1%524,288
/15131,07260.4%786,432
/1665,536533.8%3,473,408
/1732,76860.4%196,608
/1816,384130.9%212,992
/198,192483.4%393,216
/204,096674.7%274,432
/212,048765.4%155,648
/221,02450936.0%521,216
/2351216511.7%84,480
/2425646833.1%119,808

Top Receiving Countries

  1. 1🇸🇬 Singapore526K
  2. 2🇨🇳 China524K
  3. 3🇺🇸 United States96K
  4. 4🇵🇭 Philippines33K
  5. 5🇯🇵 Japan12K
  6. 6🇨🇱 Chile8,704
  7. 7🇨🇦 Canada7,168
  8. 8🇰🇷 South Korea4,096
  9. 9🇭🇰 Hong Kong SAR China4,096

Top Source Countries

  1. 1🇨🇳 China527K
  2. 2🇸🇬 Singapore524K
  3. 3🇦🇺 Australia102K
  4. 4🇨🇦 Canada74K
  5. 5🇺🇸 United States68K
  6. 6🇮🇳 India23K
  7. 7🇭🇰 Hong Kong SAR China17K
  8. 8🇧🇩 Bangladesh1,280
  9. 9🇧🇿 Belize1,024

IPv4 transferred across country borders in December 2021. Registry logs before mid-2025 do not carry a country for every transfer, so this ranking undercounts some regions.

Largest IPv4 Transfers December 2021