IPv4 Transfers January 2021

In January 2021, the five Regional Internet Registries recorded 823 transfers: 10,781,696 IPv4 addresses in 727 blocks, plus 34 IPv6 blocks and 62 AS numbers. 27 transfers moved resources between two registries. Dates are the dates the registry processed the transfer.

IPv4 addresses transferred
10.8M
727 IPv4 blocks
Registry transfers
823
34 IPv6 / 62 ASN
Inter-RIR transfers
27
210K IPv4 addresses (2%)
Mergers and acquisitions
257
566 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, January 2021
RegistryTransfersIPv4 receivedInter-RIR inInter-RIR out
ARIN33110,026,49612,032183,552
APNIC216373,24841,7285,376
RIPE NCC273370,688155,13620,736
LACNIC311,2641,024256

Inter-RIR Transfers January 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-
12K
7 transfers
8,192
1 transfers
1,024
1 transfers
0
ARIN
150K
8 transfers
-
34K
3 transfers
00
APNIC
5,120
5 transfers
256
1 transfers
-00
LACNIC0
256
1 transfers
0-0
AFRINIC0000-

IPv4 Transfers by Block Size

Number of transferred IPv4 blocks per prefix length.

IPv4 transfers by prefix length, January 2021
Prefix lengthAddresses per blockBlocksShare of blocksIPv4 addresses
/104,194,30410.1%4,194,304
/121,048,57610.1%1,048,576
/15131,07220.3%262,144
/1665,536669.1%4,325,376
/1732,76860.8%196,608
/1816,38460.8%98,304
/198,192152.1%122,880
/204,096243.3%98,304
/212,048263.6%53,248
/221,02427938.4%285,696
/235127510.3%38,400
/2425622631.1%57,856

Top Receiving Countries

  1. 1🇨🇦 Canada66K
  2. 2🇵🇭 Philippines33K
  3. 3🇺🇸 United States9,216
  4. 4🇯🇵 Japan8,192
  5. 5🇨🇷 Costa Rica8,192
  6. 6🇨🇳 China5,120
  7. 7🇭🇰 Hong Kong SAR China4,864
  8. 8🇰🇷 South Korea1,024
  9. 9🇬🇹 Guatemala1,024

Top Source Countries

  1. 1🇺🇸 United States97K
  2. 2🇨🇦 Canada8,704
  3. 3🇧🇷 Brazil8,192
  4. 4🇭🇰 Hong Kong SAR China5,120
  5. 5🇨🇳 China4,096
  6. 6🇮🇳 India3,072
  7. 7🇦🇺 Australia2,048
  8. 8🇧🇧 Barbados2,048
  9. 9🇸🇬 Singapore1,536

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

Largest IPv4 Transfers January 2021